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XK0-005 CompTIA Linux+ Exam Questions and Answers

Questions 4

A Linux administrator would like to use systemd to schedule a job to run every two hours. The administrator creates timer and service definitions and restarts the server to load these new configurations. After the restart, the administrator checks the log file and notices that the job is only running daily. Which of the following is MOST likely causing the issue?

Options:

A.

The checkdiskspace.service is not running.

B.

The checkdiskspace.service needs to be enabled.

C.

The OnCalendar schedule is incorrect in the timer definition.

D.

The system-daemon services need to be reloaded.

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Questions 5

A Linux administrator needs to redirect all HTTP traffic temporarily to the new proxy server 192.0.2.25 on port 3128. Which of the following commands will accomplish this task?

Options:

A.

iptables -t nat -D PREROUTING -p tcp --sport 80 -j DNAT - -to-destination 192.0.2.25:3128

B.

iptables -t nat -A PREROUTING -p top --dport 81 -j DNAT –-to-destination 192.0.2.25:3129

C.

iptables -t nat -I PREROUTING -p top --sport 80 -j DNAT –-to-destination 192.0.2.25:3129

D.

iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT –-to-destination 192.0.2.25:3128

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Questions 6

A Linux administrator recently downloaded a software package that is currently in a compressed file. Which of the following commands will extract the files?

Options:

A.

unzip -v

B.

bzip2 -z

C.

gzip

D.

funzip

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Questions 7

A Linux systems administrator is working to obtain the installed kernel version of several hundred systems. Which of the following utilities should the administrator use for this task?

Options:

A.

Ansible

B.

Git

C.

Docker

D.

Bash

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Questions 8

An administrator wants to reorganize the /etc/sudoers configuration file by department groups. Which of the following actions should the administrator take?

Options:

A.

Configure includedir /etc/sudoers.d directive inside /etc/sudoers file.

B.

Create a symlink in each user's home directory to /etc/sudoers.

C.

Copy /etc/sudoers and name each group with incremental numbers (/etc/sudoers1, /etc/sudoers2).

D.

Execute setfacl commands on /etc/sudoers and add permissions for each group.

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Questions 9

An organization's business office needs to collaborate on quarterly reports and asks the systems administrator to create a finance group. The administrator creates the following directory: drwxrwxr-x Business Business |j096 Oct 15 16:40 Q1

Which of the following commands will allow all members of the finance group to have group ownership of all files created in the Q1 directory while ensuring that members of the business group preserve access? (Select two).

Options:

A.

chmod g+s Q1/

B.

chmod u+s Q1/

C.

chmod a+x Q1/

D.

chown Finance Q1/

E.

chmod g+x Q1/

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Questions 10

A user sends a request to access a virtual server via SSH. Which of the following commands is used to open the SSH standard port?

Options:

A.

firewalld-cmd --permanent --add-port=22/tcp

B.

iptables-save | grep dport-22/tcp

C.

iptables -A INPUT -p tcp --dport sshd -j ACCEPT

D.

firewalld-cmd --remove-service=ssh --permanent

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Questions 11

A cloud engineer is installing packages during VM provisioning. Which of the following should the engineer use to accomplish this task?

Options:

A.

Cloud-init

B.

Bash

C.

Docker

D.

Sidecar

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Questions 12

A systems administrator engineer wants to configure a Linux server's time zone to America/Chicago. The engineer verifies that the server's time zone is configured for Asia/Tokyo:

XK0-005 Question 12

Which of the following commands should the engineer execute to make this change?

Options:

A.

date configure -set-timezone America/Chicago

B.

set-timezone -config America/Chicago

C.

time date set America/Chicago

D.

timedatect1 set-timezone America/Chicago

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Questions 13

The applications team is reporting issues when trying to access the web service hosted in a Linux system. The Linux systems administrator is reviewing the following outputs:

Output 1:

* httpd.service = The Apache HTTPD Server

Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)

Active: inactive (dead)

Docs: man:httpd(8) man:apachectl(8)

Output 2:

16:51:16 up 28 min, 1 user, load average: 0.00, 0.00, 0.07

Which of the following statements best describe the root cause? (Select two).

Options:

A.

The httpd service is currently started.

B.

The httpd service is enabled to auto start at boot time, but it failed to start.

C.

The httpd service was manually stopped.

D.

The httpd service is not enabled to auto start at boot time.

E.

The httpd service runs without problems.

F.

The httpd service did not start during the last server reboot.

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Questions 14

Which of the following directories contains binaries that only a root user should run?

Options:

A.

/sbin

B.

/bin

C.

/root

D.

/lib

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Questions 15

A Linux administrator wants a permission bit on a shared folder that allows only the owner of the file within that directory or the root user to delete or rename the file. Which of the following commands will help achieve this goal?

Options:

A.

chmod u-w /directory/

B.

chmod a-r /directory/

C.

chmod o-t /directory/

D.

chmod +t /directory/

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Questions 16

A Linux administrator is changing the default system umask. The newly created files should have the -rw-r----- permission, and the newly created directories should have the drwxr----- permission. Which of the following commands should the administrator use?

Options:

A.

umask 0035

B.

umask 0036

C.

umask 0037

D.

umask 0038

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Questions 17

A systems administrator needs to compress log files using the .tar.bz2 format. Which of the following commands should the administrator use?

Options:

A.

tar -cvtf logs.car.bz2 /var/log/*

B.

tar -cvzf logs.tar.bz2 /var/log/*

C.

tar -cvjf logs.tar.bz2 /var/log/*

D.

tar -cvbf logs.tar.bz2 /var/log/*

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Questions 18

A systems administrator is reviewing the following output on the text editor that is being used to update the company's internal database records:

Which of the following extensions should the systems administrator use when saving the file?

Options:

A.

.json

B.

.yaml

C.

.tf

D.

.sh

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Questions 19

Users report that connections to a MariaDB service are being closed unexpectedly. A systems administrator troubleshoots the issue and finds the following message in /var/log/messages:

Which of the following is causing the connection issue?

Options:

A.

The process mysqld is using too many semaphores.

B.

The server is running out of file descriptors.

C.

Something is starving the server resources.

D.

The amount of RAM allocated to the server is too high.

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Questions 20

Users have reported that the interactive sessions were lost on a Linux server. A Linux administrator verifies the server was switched to rescue.target mode for maintenance. Which of the following commands will restore the server to its usual target?

Options:

A.

telinit 0

B.

systemct1 reboot

C.

systemct1 get-default

D.

systemct1 emergency

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Questions 21

A Linux administrator needs to restart a server and wants to see if any users are currently connected to it. Which of the following commands should the administrator run to find this information?

Options:

A.

man

B.

id

C.

w

D.

host

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Questions 22

A Linux administrator needs to determine whether a hostname is in the DNS. Which of the following would supply the information that is needed?

Options:

A.

nslookup

B.

rsynс

C.

netstat

D.

host

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Questions 23

A systems administrator needs to clone the partition /dev/sdc1 to /dev/sdd1. Which of the following commands will accomplish this task?

Options:

A.

tar -cvzf /dev/sdd1 /dev/sdc1

B.

rsync /dev/sdc1 /dev/sdd1

C.

dd if=/dev/sdc1 of=/dev/sdd1

D.

scp /dev/sdc1 /dev/sdd1

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Questions 24

A Linux engineer needs to get information from the foo.com domain mail servers. Which of the following network tools should the engineer use?

Options:

A.

arp mx foo.com

B.

nc mx foo.com

C.

dig mx foo.com

D.

route mx foo.com

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Questions 25

A Linux administrator needs to create an image named sda.img from the sda disk and store it in the /tmp directory. Which of the following commands should be used to accomplish this task?

Options:

A.

dd of=/dev/sda if=/tmp/sda.img

B.

dd if=/dev/sda of=/tmp/sda.img

C.

dd --if=/dev/sda --of=/tmp/sda.img

D.

dd --of=/dev/sda --if=/tmp/sda.img

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Questions 26

A systems administrator is deploying three identical, cloud-based servers. The administrator is using the following code to complete the task:

Which of the following technologies is the administrator using?

Options:

A.

Ansible

B.

Puppet

C.

Chef

D.

Terraform

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Questions 27

Some servers in an organization have been compromised. Users are unable to access to the organization’s web page and other services. While reviewing the system log, a systems administrator notices messages from the kernel regarding firewall rules:

Which of the following commands will remediate and help resolve the issue?

Options:

A.
B.
C.
D.
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Questions 28

A Linux administrator created a new file system. Which of the following files must be updated to ensure the filesystem mounts at boot time?

Options:

A.

/etc/sysctl

B.

/etc/filesystems

C.

/etc/fstab

D.

/etc/nfsmount.conf

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Questions 29

A developer is trying to install an application remotely that requires a graphical interface for installation. The developer requested assistance to set up the necessary environment variables along with X11 forwarding in SSH. Which of the following environment variables must be set in remote shell in order to launch the graphical interface?

Options:

A.

$RHOST

B.

SETENV

C.

$SHELL

D.

$DISPLAY

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Questions 30

A junior Linux administrator is tasked with installing an application. The installation guide states the application should only be installed in a run level 5 environment.

Which of the following commands would ensure the server is set to runlevel 5?

Options:

A.

systemct1 isolate multi-user.target

B.

systemct1 isolate graphical.target

C.

systemct1 isolate network.target

D.

systemct1 isolate basic.target

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Questions 31

A Linux administrator needs to ensure that Java 7 and Java 8 are both locally available for developers to use when deploying containers. Currently only Java 8 is available. Which of the following commands should the administrator run to ensure both versions are available?

Options:

A.

docker image load java:7

B.

docker image pull java:7

C.

docker image import java:7

D.

docker image build java:7

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Questions 32

A systems administrator received a notification that a system is performing slowly. When running the top command, the systems administrator can see the following values:

Which of the following commands will the administrator most likely run NEXT?

Options:

A.

vmstat

B.

strace

C.

htop

D.

lsof

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Questions 33

A systems administrator is tasked with creating a cloud-based server with a public IP address.

XK0-005 Question 33

Which of the following technologies did the systems administrator use to complete this task?

Options:

A.

Puppet

B.

Git

C.

Ansible

D.

Terraform

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Questions 34

A Linux administrator has installed a web server, a database server, and a web application on a server. The web application should be active in order to render the web pages. After the administrator restarts the server, the website displays the following message in the browser: Error establishing a database connection. The Linux administrator reviews the following relevant output from the systemd init files:

The administrator needs to ensure that the database is available before the web application is started. Which of the following should the administrator add to the HTTP server .service file to accomplish this task?

Options:

A.

TRIGGERS=mariadb.service

B.

ONFAILURE=mariadb.service

C.

WANTEDBY=mariadb.service

D.

REQUIRES=mariadb.service

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Questions 35

Developers have requested implementation of a persistent, static route on the application server. Packets sent over the interface eth0 to 10.0.213.5/32 should be routed via 10.0.5.1. Which of the following commands should the administrator run to achieve this goal?

Options:

A.

route -i etho -p add 10.0.213.5 10.0.5.1

B.

route modify eth0 +ipv4.routes "10.0.213.5/32 10.0.5.1"

C.

echo "10.0.213.5 10.0.5.1 eth0" > /proc/net/route

D.

ip route add 10.0.213.5/32 via 10.0.5.1 dev eth0

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Questions 36

A systems administrator needs to reconfigure a Linux server to allow persistent IPv4 packet forwarding. Which of the following commands is the correct way to accomplish this task?

Options:

A.

echo 1 > /proc/sys/net/ipv4/ipv_forward

B.

sysctl -w net.ipv4.ip_forward=1

C.

firewall-cmd --enable ipv4_forwarding

D.

systemct1 start ipv4_forwarding

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Questions 37

A Linux engineer needs to download a ZIP file and wants to set the nice of value to -10 for this new process. Which of the following commands will help to accomplish the task?

Options:

A.

$ nice -v -10 wget https://foo.com/installation.zip

B.

$ renice -v -10 wget https://foo.com/installation.2ip

C.

$ renice -10 wget https://foo.com/installation.zip

D.

$ nice -10 wget https://foo.com/installation.zip

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Questions 38

A systems administrator wants to check for running containers. Which of the following commands can be used to show this information?

Options:

A.

docker pull

B.

docker stats

C.

docker ps

D.

docker list

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Questions 39

A systems administrator needs to verify whether the built container has the app.go file in its root directory. Which of the following can the administrator use to verify the root directory has this file?

Options:

A.

docker image inspect

B.

docker container inspect

C.

docker exec ls

D.

docker ps

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Questions 40

A senior Linux administrator has created several scripts that will be used to install common system applications. These scripts are published to a reposito-ry to share with the systems team. A junior Linux administrator needs to re-trieve the scripts and make them available on a local workstation. Which of the following Git commands should the junior Linux administrator use to accom-plish this task?

Options:

A.

fetch

B.

checkout

C.

clone

D.

branch

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Questions 41

A Linux administrator has set up a new DNS forwarder and is configuring all internal servers to use the new forwarder to look up external DNS requests. The administrator needs to modify the firewall on the server for the DNS forwarder to allow the internal servers to communicate to it and make the changes persistent between server reboots. Which of the following commands should be run on the DNS forwarder server to accomplish this task?

Options:

A.

ufw allow out dns

B.

systemct1 reload firewalld

C.

iptables -A OUTPUT -p udp -ra udp -dport 53 -j ACCEPT

D.

flrewall-cmd --zone-public --add-port-53/udp --permanent

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Questions 42

A Linux administrator has logged in to a server for the first time and needs to know which services are allowed through the firewall. Which of the following options will return the results for which the administrator is looking?

Options:

A.

firewall-cmd —get-services

B.

firewall-cmd —check-config

C.

firewall-cmd —list-services

D.

systemct1 status firewalld

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Questions 43

A Linux administrator found many containers in an exited state. Which of the following commands will allow the administrator to clean up the containers in an exited state?

Options:

A.

docker rm --all

B.

docker rm $(docker ps -aq)

C.

docker images prune *

D.

docker rm --state exited

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Questions 44

A Linux administrator needs to resolve a service that has failed to start. The administrator runs the following command:

The following output is returned

XK0-005 Question 44

Which of the following is MOST likely the issue?

Options:

A.

The service does not have permissions to read write the startupfile.

B.

The service startupfile size cannot be 81k.

C.

The service startupfile cannot be owned by root.

D.

The service startupfile should not be owned by the root group.

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Questions 45

A server is experiencing intermittent connection issues. Some connections to the Internet work as intended, but some fail as if there is no connectivity. The systems administrator inspects the server configuration:

Which of the following is MOST likely the cause of the issue?

Options:

A.

An internal-only DNS server is configured.

B.

The IP netmask is wrong for ens3.

C.

Two default routes are configured.

D.

The ARP table contains incorrect entries.

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Questions 46

Which of the following data structures is written in JSON?

A)

B)

C)

D)

XK0-005 Question 46

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Questions 47

In order to copy data from another VLAN, a systems administrator wants to temporarily assign IP address 10.0.6 5/24 to the newly added network interface enp1s0f1. Which of the following commands should the administrator run to achieve the goal?

Options:

A.

ip addr add 10.0.6.5/24 dev enpls0f1

B.

echo "IPV4_ADDRESS=10.0.6.5/24" > /etc/sysconfig/network-scripts/ifcfg-enplsOfl

C.

ifconfig 10.0.6.5/24 enpsIs0f1

D.

nmcli conn add lpv4.address-10.0.6.5/24 ifname enpls0f1

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Questions 48

A Linux administrator needs to create a new user named user02. However, user02 must be in a different home directory, which is under /comptia/projects. Which of the following commands will accomplish this task?

Options:

A.

useradd -d /comptia/projects user02

B.

useradd -m /comptia/projects user02

C.

useradd -b /comptia/projects user02

D.

useradd -s /comptia/projects user02

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Questions 49

Rugged appliances are small appliances with ruggedized hardware and like Quantum Spark appliance they use which operating system?

Options:

A.

Centos Linux

B.

Gaia embedded

C.

Gaia

D.

Red Hat Enterprise Linux version 5

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Questions 50

A systems administrator is troubleshooting a connectivity issue pertaining to access to a system named db.example.com. The system IP address should be 192.168.20.88. The administrator issues the dig command and receives the following output:

The administrator runs grep db.example.com /etc/hosts and receives the following output:

Given this scenario, which of the following should the administrator do to address this issue?

Options:

A.

Modify the /etc/hosts file and change the db.example.com entry to 192.168.20.89.

B.

Modify the /etc/network file and change the db.example.com entry to 192.168.20.88.

C.

Modify the /etc/network file and change the db.example.com entry to 192.168.20.89.

D.

Modify the /etc/hosts file and change the db.example.com entry to 192.168.20.88.

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Questions 51

After installing a new version of a package, a systems administrator notices a new version of the corresponding, service file was Installed In order to use the new version of the, service file, which of the following commands must be Issued FIRST?

Options:

A.

systemct1 status

B.

systemct1 stop

C.

systemct1 reinstall

D.

systemct1 daemon-reload

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Questions 52

A Linux systems administrator is troubleshooting an I/O latency on a single CPU server. The administrator runs a top command and receives the following output:

%Cpu(s): 0.2 us, 33.1 sy, 0.0 ni, 0.0 id, 52.4 wa, 0.0 hi, 0.2 si, 0.0 st

Which of the following is correct based on the output received from the exe-cuted command?

Options:

A.

The server's CPU is taking too long to process users' requests.

B.

The server's CPU shows a high idle-time value.

C.

The server's CPU is spending too much time waiting for data inputs.

D.

The server's CPU value for the time spent on system processes is low.

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Questions 53

After starting an Apache web server, the administrator receives the following error:

Apr 23 localhost.localdomain httpd 4618] : (98) Address already in use: AH00072: make_sock: could not bind to address [: :]80

Which of the following commands should the administrator use to further trou-bleshoot this issue?

Options:

A.

Ss

B.

Ip

C.

Dig

D.

Nc

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Questions 54

The security team has identified a web service that is running with elevated privileges A Linux administrator is working to change the systemd service file to meet security compliance standards. Given the following output:

Which of the following remediation steps will prevent the web service from running as a privileged user?

Options:

A.

Removing the ExecStarWusr/sbin/webserver -D SOPTIONS from the service file

B.

Updating the Environment File line in the [Service] section to/home/webservice/config

C.

Adding the User-webservice to the [Service] section of the service file

D.

Changing the:nulti-user.target in the [Install] section to basic.target

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Questions 55

A cloud engineer is asked to copy the file deployment.yaml from a container to the host where the container is running. Which of the following commands can accomplish this task?

Options:

A.

docker cp container_id/deployment.yaml deployment.yaml

B.

docker cp container_id:/deployment.yaml deployment.yaml

C.

docker cp deployment.yaml local://deployment.yaml

D.

docker cp container_id/deployment.yaml local://deployment.yaml

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Questions 56

A systems administrator is encountering performance issues. The administrator runs 3 commands with the following output

The Linux server has the following system properties

CPU: 4 vCPU

Memory: 50GB

Which of the following accurately describes this situation?

Options:

A.

The system is under CPU pressure and will require additional vCPUs

B.

The system has been running for over a year and requires a reboot.

C.

Too many users are currently logged in to the system

D.

The system requires more memory

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Questions 57

A Linux systems administrator receives reports from various users that an application hosted on a server has stopped responding at similar times for several days in a row. The administrator logs in to the system and obtains the following output:

Output 1:

Output 2:

Output 3:

Which of the following should the administrator do to provide the BEST solution for the reported issue?

Options:

A.

Configure memory allocation policies during business hours and prevent the Java process from going into a zombie state while the server is idle.

B.

Configure a different nice value for the Java process to allow for more users and prevent the Java process from restarting during business hours.

C.

Configure more CPU cores to allow for the server to allocate more processing and prevent the Java process from consuming all of the available resources.

D.

Configure the swap space to allow for spikes in usage during peak hours and prevent the Java process from stopping due to a lack of memory.

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Questions 58

A Linux systems administrator is configuring a new filesystem that needs the capability to be mounted persistently across reboots. Which of the following commands will accomplish this task? (Choose two.)

Options:

A.

df -h /data

B.

mkfs.ext4 /dev/sdc1

C.

fsck /dev/sdc1

D.

fdisk -l /dev/sdc1

E.

echo "/data /dev/sdc1 ext4 defaults 0 0" >> /etc/fstab

F.

echo "/dev/sdc1 /data ext4 defaults 0 0" >> /etc/fstab

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Questions 59

A Linux administrator needs to remove software from the server. Which of the following RPM options should be used?

Options:

A.

rpm -s

B.

rрm -d

C.

rpm -q

D.

rpm -e

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Questions 60

A DevOps engineer needs to download a Git repository from https://git.company.com/admin/project.git. Which of the following commands will achieve this goal?

Options:

A.

git clone https://git.company.com/admin/project.git

B.

git checkout https://git.company.com/admin/project.git

C.

git pull https://git.company.com/admin/project.git

D.

git branch https://git.company.com/admin/project.git

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Questions 61

A Linux engineer is setting the sticky bit on a directory called devops with 755 file permission. Which of the following commands will accomplish this task?

Options:

A.

chown -s 755 devops

B.

chown 1755 devops

C.

chmod -s 755 devops

D.

chmod 1755 devops

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Questions 62

A systems engineer is adding a new 1GB XFS filesystem that should be temporarily mounted under /ops/app. Which of the following is the correct list of commands to achieve this goal?

Options:

A.
B.
C.
D.
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Questions 63

A Linux administrator wants to set the SUID of a file named dev_team.text with 744 access rights. Which of the following commands will achieve this goal?

Options:

A.

chmod 4744 dev_team.txt

B.

chmod 744 --setuid dev_team.txt

C.

chmod -c 744 dev_team.txt

D.

chmod -v 4744 --suid dev_team.txt

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Questions 64

A systems administrator made some changes in the ~/.bashrc file and added an alias command. When the administrator tried to use the alias command, it did not work. Which of the following should be executed FIRST?

Options:

A.

source ~/.bashrc

B.

read ~/.bashrc

C.

touch ~/.bashrc

D.

echo ~/.bashrc

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Questions 65

Which of the following technologies can be used as a central repository of Linux users and groups?

Options:

A.

LDAP

B.

MFA

C.

SSO

D.

PAM

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Questions 66

A developer has been unable to remove a particular data folder that a team no longer uses. The developer escalated the issue to the systems administrator. The following output was received:

Which of the following commands can be used to resolve this issue?

Options:

A.

chgrp -R 755 data/

B.

chmod -R 777 data/

C.

chattr -R -i data/

D.

chown -R data/

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Questions 67

Which of the following commands will display the operating system?

Options:

A.

uname -n

B.

uname -s

C.

uname -o

D.

uname -m

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Questions 68

A Linux administrator is troubleshooting SSH connection issues from one of the workstations.

When users attempt to log in from the workstation to a server with the IP address 104.21.75.76, they receive the following message:

The administrator reviews the information below:

Which of the following is causing the connectivity issue?

Options:

A.

The workstation has the wrong IP settings.

B.

The sshd service is disabled.

C.

The server’s firewall is preventing connections from being made.

D.

The server has an incorrect default gateway configuration.

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Questions 69

Several users reported that they were unable to write data to the /oracle1 directory. The following output has been provided:

Which of the following commands should the administrator use to diagnose the issue?

Options:

A.

df -i /oracle1

B.

fdisk -1 /dev/sdb1

C.

lsblk /dev/sdb1

D.

du -sh /oracle1

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Questions 70

After listing the properties of a system account, a systems administrator wants to remove the expiration date of a user account. Which of the following commands will accomplish this task?

Options:

A.

chgrp system accountname

B.

passwd –s accountname

C.

chmod -G system account name

D.

chage -E -1 accountname

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Questions 71

An administrator installed an application from source into /opt/operations1/ and has received numerous reports that users are not able to access the application without having to use the full path /opt/operations1/bin/*. Which of the following commands should be used to resolve this issue?

Options:

A.

echo 'export PATH=$PATH:/opt/operations1/bin' >> /etc/profile

B.

echo 'export PATH=/opt/operations1/bin' >> /etc/profile

C.

echo 'export PATH=$PATH/opt/operations1/bin' >> /etc/profile

D.

echo 'export $PATH:/opt/operations1/bin' >> /etc/profile

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Questions 72

A Linux engineer set up two local DNS servers (10.10.10.10 and 10.10.10.20) and was testing email connectivity to the local mail server using the mail command on a local machine when the following error appeared:

The local machine DNS settings are:

Which of the following commands could the engineer use to query the DNS server to get mail server information?

Options:

A.

dig @example.com 10.10.10.20 a

B.

dig @10.10.10.20 example.com mx

C.

dig @example.com 10.10.10.20 ptr

D.

dig @10.10.10.20 example.com ns

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Questions 73

As a Systems Administrator, to reduce disk space, you were tasked to create a shell script that does the following:

Add relevant content to /tmp/script.sh, so that it finds and compresses rotated files in /var/log without recursion.

INSTRUCTIONS

Fill the blanks to build a script that performs the actual compression of rotated log files.

If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

XK0-005 Question 73

Options:

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Questions 74

Junior system administrator had trouble installing and running an Apache web server on a Linux server. You have been tasked with installing the Apache web server on the Linux server and resolving the issue that prevented the junior administrator from running Apache.

INSTRUCTIONS

Install Apache and start the service. Verify that the Apache service is running with the defaults.

Typing “help” in the terminal will show a list of relevant event commands.

If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

Options:

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Questions 75

To harden one of the servers, an administrator needs to remove the possibility of remote administrative login via the SSH service. Which of the following should the administrator do?

Options:

A.

Add the line DenyUsers root to the /etc/hosts.deny file.

B.

Set PermitRootLogin to no in the /etc/ssh/sshd_config file.

C.

Add the line account required pam_nologin. so to the /etc/pam.d/sshd file.

D.

Set PubKeyAuthentication to no in the /etc/ssh/ssh_config file.

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Questions 76

A Linux system is failing to boot with the following error:

Which of the following actions will resolve this issue? (Choose two.)

Options:

A.

Execute grub-install --root-directory=/mnt and reboot.

B.

Execute grub-install /dev/sdX and reboot.

C.

Interrupt the boot process in the GRUB menu and add rescue to the kernel line.

D.

Fix the partition modifying /etc/default/grub and reboot.

E.

Interrupt the boot process in the GRUB menu and add single to the kernel line.

F.

Boot the system on a LiveCD/ISO.

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Questions 77

A systems administrator creates a public key for authentication. Which of the following tools is most suitable to use when uploading the key to the remote

servers?

Options:

A.

scp

B.

ssh-copy-id

C.

ssh-agent

D.

ssh-keyscan

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Questions 78

Which of the following files holds the system configuration for journal when running systemd?

Options:

A.

/etc/systemd/journald.conf

B.

/etc/systemd/systemd-journalctl.conf

C.

/usr/lib/systemd/journalctl.conf

D.

/etc/systemd/systemd-journald.conf

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Questions 79

An administrator needs to make some changes in the IaC declaration templates. Which of the following commands would maintain version control?

Options:

A.

git clone https://github.com/comptia/linux+-.gitgit push origin

B.

git clone https://qithub.com/comptia/linux+-.gitgit fetch New-Branch

C.

git clone https://github.com/comptia/linux+-.gitgit status

D.

git clone https://github.com/comptia/linuxt+-.gitgit checkout -b

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Questions 80

Due to performance issues on a server, a Linux administrator needs to termi-nate an unresponsive process. Which of the following commands should the

administrator use to terminate the process immediately without waiting for a graceful shutdown?

Options:

A.

kill -SIGKILL 5545

B.

kill -SIGTERM 5545

C.

kill -SIGHUP 5545

D.

kill -SIGINT 5545

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Questions 81

Which of the following is the main purpose of SSO?

Options:

A.

To allow a user to authenticate once and have access to multiple applications or systems without having to log in again

B.

To add an extra layer of protection, reducing the risk of unauthorized access, requiring more than just a password to access

C.

To be an essential component for managing authentication, authorization, and identity information

D.

To serve as an information protection mechanism that protects identities with administrative access

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Questions 82

A user is asking the systems administrator for assistance with writing a script to verify whether a file exists. Given the following:

XK0-005 Question 82

Which of the following commands should replace the string?

Options:

A.

if [ -f "$filename" ]; then

B.

if [ -d "$filename" ]; then

C.

if [ -f "$filename" ] then

D.

if [ -f "$filename" ]; while

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Questions 83

A junior systems administrator has just generated public and private authentication keys for passwordless login. Which of the following files will be moved to the remote servers?

Options:

A.

id_dsa.pem

B.

id_rsa

C.

id_ecdsa

D.

id_rsa.pub

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Questions 84

While inspecting a recently compromised Linux system, the administrator identified a number of processes that should not have been running:

Which of the following commands should the administrator use to terminate all of the identified processes?

Options:

A.

pkill -9 -f "upload*.sh"

B.

kill -9 "upload*.sh"

C.

killall -9 -upload*.sh"

D.

skill -9 "upload*.sh"

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Questions 85

A user reported issues when trying to log in to a Linux server. The following outputs were received:

Given the outputs above. which of the following is the reason the user is una-ble to log in to the server?

Options:

A.

User1 needs to set a long password.

B.

User1 is in the incorrect group.

C.

The user1 shell assignment incorrect.

D.

The user1 password is expired.

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Questions 86

During a security scan, the password of an SSH key file appeared to be too weak and was cracked. Which of the following commands would allow a user to choose a stronger password and set it on the existing SSH key file?

Options:

A.

passwd

B.

ssh

C.

ssh-keygen

D.

pwgen

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Questions 87

A systems administrator pressed Ctrl+Z after starting a program using the command line, and the shell prompt was presented. In order to go back to the program, which of the following commands can the administrator use?

Options:

A.

fg

B.

su

C.

bg

D.

ed

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Questions 88

In which of the following filesystems are system logs commonly stored?

Options:

A.

/var

B.

/tmp

C.

/etc

D.

/opt

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Questions 89

What is the main objective when using Application Control?

Options:

A.

To filter out specific content.

B.

To assist the firewall blade with handling traffic.

C.

To see what users are doing.

D.

Ensure security and privacy of information.

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Questions 90

A cloud engineer needs to block the IP address 192.168.10.50 from accessing a Linux server. Which of the following commands will achieve this goal?

Options:

A.

iptables -F INPUT -j 192.168.10.50 -m DROP

B.

iptables -A INPUT -s 192.168.10.30 -j DROP

C.

iptables -i INPUT --ipv4 192.168.10.50 -z DROP

D.

iptables -j INPUT 192.168.10.50 -p DROP

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Questions 91

A Linux engineer needs to create a custom script, cleanup.sh, to run at boot as part of the system services. Which of the following processes would accomplish this task?

Options:

A.

Create a unit file in the /etc/default/ directory.systemct1 enable cleanupsystemct1 is-enabled cleanup

B.

Create a unit file in the /etc/ske1/ directory.systemct1 enable cleanupsystemct1 is-enabled cleanup

C.

Create a unit file in the /etc/systemd/system/ directory.systemct1 enable cleanupsystemct1 is-enabled cleanup

D.

Create a unit file in the /etc/sysctl.d/ directory.systemct1 enable cleanupsystemct1 is-enabled cleanup

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Questions 92

A new disk was presented to a server as /dev/ sdd. The systems administrator needs to check if a partition table is on that disk. Which of the following commands can show this information?

Options:

A.

Isscsi

B.

fdisk

C.

blkid

D.

partprobe

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Questions 93

A systems administrator is troubleshooting connectivity issues and trying to find out why a Linux server is not able to reach other servers on the same subnet it is connected to. When listing link parameters, the following is presented:

XK0-005 Question 93

Based on the output above, which of following is the MOST probable cause of the issue?

Options:

A.

The address ac:00:11:22:33:cd is not a valid Ethernet address.

B.

The Ethernet broadcast address should be ac:00:11:22:33:ff instead.

C.

The network interface eth0 is using an old kernel module.

D.

The network interface cable is not connected to a switch.

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Questions 94

A systems administrator created a web server for the company and is required to add a tag for the API so end users can connect. Which of the following would the administrator do to complete this requirement?

Options:

A.

hostnamectl status --no-ask-password

B.

hostnamectl set-hostname "$(perl -le "print" "A" x 86)"

C.

hostnamectl set-hostname Comptia-WebNode -H root@192.168.2.14

D.

hostnamectl set-hostname Comptia-WebNode --transient

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Questions 95

A systems administrator frequently connects to a remote host via SSH and a non-standard port. The systems administrator would like to avoid passing the port parameter on the command line every time. Which of the following files can be used to set a different port value for that host?

Options:

A.

/etc/ssh/sshd_config

B.

/etc/ssh/moduli

C.

~/.ssh/config

D.

~/.ssh/authorized_keys

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Questions 96

A Linux administrator is scheduling a system job that runs a script to check available disk space every hour. The Linux administrator does not want users to be able to start the job. Given the following:

The Linux administrator attempts to start the timer service but receives the following error message:

XK0-005 Question 96

Which of the following is MOST likely the reason the timer will not start?

Options:

A.

The checkdiskspace.timer unit should be enabled via systemct1.

B.

The timers.target should be reloaded to get the new configuration.

C.

The checkdiskspace.timer should be configured to allow manual starts.

D.

The checkdiskspace.timer should be started using the sudo command.

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Questions 97

A Linux systems administrator is setting up a new web server and getting 404 - NOT FOUND errors while trying to access the web server pages from the browser. While working on the diagnosis of this issue, the Linux systems administrator executes the following commands:

Which of the following commands will BEST resolve this issue?

Options:

A.

sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

B.

restorecon -R -v /var/www/html

C.

setenforce 0

D.

setsebool -P httpd_can_network_connect_db on

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Questions 98

A Linux system is failing to boot. The following error is displayed in the serial console:

[[1;33mDEPEND[Om] Dependency failed for /data.

[[1;33mDEPEND[Om] Dependency failed for Local File Systems

...

Welcome to emergency mode! After logging in, type "journalctl -xb" to viewsystem logs, "systemct1 reboot" to reboot, "systemct1 default" to try again to boot into default mode.

Give root password for maintenance

(or type Control-D to continue}

Which of the following files will need to be modified for this server to be able to boot again?

Options:

A.

/etc/mtab

B.

/dev/sda

C.

/etc/fstab

D.

/ete/grub.conf

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Questions 99

A systems administrator is tasked with setting up key-based SSH authentication. In which of the following locations should the administrator place the public keys for the server?

Options:

A.

~/.sshd/authkeys

B.

~/.ssh/keys

C.

~/.ssh/authorized_keys

D.

~/.ssh/keyauth

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Questions 100

A Linux systems administrator receives a notification that one of the server’s filesystems is full. Which of the following commands would help the administrator to identify this filesystem?

Options:

A.

lsblk

B.

fdisk

C.

df -h

D.

du -ah

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Questions 101

An administrator recently updated the BIND software package and would like to review the default configuration that shipped with this version. Which of the following files should the administrator review?

Options:

A.

/etc/named.conf.rpmnew

B.

/etc/named.conf.rpmsave

C.

/etc/named.conf

D.

/etc/bind/bind.conf

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Questions 102

Which of the following can be used as a secure way to access a remote termi-nal?

Options:

A.

TFTP

B.

SSH

C.

SCP

D.

SFTP

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Questions 103

Using AD Query, the security gateway connections to the Active Directory Domain Controllers using what protocol?

Options:

A.

Windows Management Instrumentation (WMI)

B.

Hypertext Transfer Protocol Secure (HTTPS)

C.

Lightweight Directory Access Protocol (LDAP)

D.

Remote Desktop Protocol (RDP)

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Questions 104

A Linux system is getting an error indicating the root filesystem is full. Which of the following commands should be used by the systems administrator to resolve this issue? (Choose three.)

Options:

A.

df -h /

B.

fdisk -1 /dev/sdb

C.

growpart /dev/mapper/rootvg-rootlv

D.

pvcreate /dev/sdb

E.

lvresize –L +10G -r /dev/mapper/rootvg-rootlv

F.

lsblk /dev/sda

G.

parted -l /dev/mapper/rootvg-rootlv

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Questions 105

A Linux administrator is installing a web server and needs to check whether web traffic has already been allowed through the firewall. Which of the following commands should the administrator use to accomplish this task?

Options:

A.

firewalld query-service-http

B.

firewall-cmd --check-service http

C.

firewall-cmd --query-service http

D.

firewalld --check-service http

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Questions 106

A cloud engineer needs to change the secure remote login port from 22 to 49000. Which of the following files should the engineer modify to change the port number to the desired value?

Options:

A.

/etc/host.conf

B.

/etc/hostname

C.

/etc/services

D.

/etc/ssh/sshd_config

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Questions 107

A systems administrator is enabling LUKS on a USB storage device with an ext4 filesystem format. The administrator runs dmesg and notices the following output:

Given this scenario, which of the following should the administrator perform to meet these requirements? (Select three).

Options:

A.

gpg /dev/sdcl

B.

pvcreate /dev/sdc

C.

mkfs . ext4 /dev/mapper/LUKSCJ001 - L ENCRYPTED

D.

umount / dev/ sdc

E.

fdisk /dev/sdc

F.

mkfs . vfat /dev/mapper/LUKS0001 — L ENCRYPTED

G.

wipefs —a/dev/sdbl

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Questions 108

A Linux administrator is alerted to a storage capacity issue on a server without a specific mount point or directory. Which of the following commands would be MOST helpful for troubleshooting? (Choose two.)

Options:

A.

parted

B.

df

C.

mount

D.

du

E.

fdisk

F.

dd

G.

ls

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Questions 109

A Linux administrator needs to connect securely to a remote server in order to install application software. Which of the following commands would allow this connection?

Options:

A.

scp "ABC-key.pem" root@10.0.0.1

B.

sftp rooteiO.0.0.1

C.

telnet 10.0.0.1 80

D.

ssh -i "ABC-key.pem" root@10.0.0.1

E.

sftp "ABC-key.pem" root@10.0.0.1

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Questions 110

A development team asks an engineer to guarantee the persistency of journal log files across system reboots. Which of the following commands would accomplish this task?

Options:

A.

grep -i auto /etc/systemd/journald.conf && systemct1 restart systemd-journald.service

B.

cat /etc/systemd/journald.conf | awk '(print $1,$3)'

C.

sed -i 's/auto/persistent/g' /etc/systemd/journald.conf && sed -i 'persistent/s/ˆ#//q' /etc/systemd/journald.conf

D.

journalctl --list-boots && systemct1 restart systemd-journald.service

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Questions 111

A cloud engineer needs to check the link status of a network interface named eth1 in a Linux server. Which of the following commands can help to achieve the goal?

Options:

A.

ifconfig hw eth1

B.

netstat -r eth1

C.

ss -ti eth1

D.

ip link show eth1

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Questions 112

A Linux administrator is configuring a two-node cluster and needs to be able to connect the nodes to each other using SSH keys from the root account. Which of the following commands will accomplish this task?

Options:

A.

[root@nodea ssh —i ~/ . ssh/±d rsa root@nodeb

B.

[root@nodea scp -i . ssh/id rsa root@nodeb

C.

[root@nodea ssh—copy-id —i .ssh/id rsa root@nodeb

D.

[root@nodea # ssh add -c ~/ . ssh/id rsa root@nodeb

E.

[root@nodea # ssh add -c ~/. ssh/id rsa root@nodeb

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Questions 113

A systems administrator created a new Docker image called test. After building the image, the administrator forgot to version the release. Which of the following will allow the administrator to assign the v1 version to the image?

Options:

A.

docker image save test test:v1

B.

docker image build test:vl

C.

docker image tag test test:vl

D.

docker image version test:v1

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Questions 114

A Linux administrator copied a Git repository locally, created a feature branch, and committed some changes to the feature branch. Which of the following Git actions should the Linux administrator use to publish the changes to the main branch of the remote repository?

Options:

A.

rebase

B.

tag

C.

commit

D.

push

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Questions 115

The application team has reported latency issues that are causing the application to crash on the Linux server. The Linux administrator starts

troubleshooting and receives the following output:

Which of the following commands will improve the latency issue?

Options:

A.

# echo 'net.core.net_backlog = 5000000' >> /etc/sysctl.conf# sysctl -p# systemctl daemon-reload

B.

# ifdown eth0# ip link set dev eth0 mtu 800# ifup eth0

C.

# systemctl stop network# ethtool -g eth0 512# systemctl start network

D.

# echo 'net.core.rmem max = 12500000' >> /etc/sysctl.conf# echo 'net.core.wmem_max = 12500000' >> /etc/sysctl.conf# sysctl -p

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Questions 116

An administrator is provisioning an Apache web server. When the administrator visits the server website, the browser displays a message indicating the website cannot be reached. Which of the following commands should the administrator use to verify whether the service Is running?

Options:

A.

systemctlstatus httpd

B.

systemctlmask httpd

C.

systemctlreload httpd

D.

systemctlrestart httpd

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Questions 117

A Linux administrator wants to prevent the httpd web service from being started both manually and automatically on a server. Which of the following should the administrator use to accomplish this task?

Options:

A.

systemctl mask httpd

B.

systemctl disable httpd

C.

systemctl stop httpd

D.

systemctl reload httpd

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Questions 118

A user is unable to remotely log on to a server using the server name server1 and port 22. The Linux engineer troubleshoots the issue and gathers the following information:

Which of the following is most likely causing the issue?

Options:

A.

server 1 is not in the DNS.

B.

sshd is running on a non-standard port.

C.

sshd is not an active service.

D.

serverl is using an incorrect IP address.

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Questions 119

A Linux administrator is troubleshooting a systemd mount unit file that is not working correctly. The file contains:

[root@system] # cat mydocs.mount

[Unit]

Description=Mount point for My Documents drive

[Mount]

What=/dev/drv/disk/by-uuid/94afc9b2-ac34-ccff-88ae-297ab3c7ff34

Where=/home/user1/My Documents

Options=defaults

Type=xfs

[Install]

WantedBy=multi-user.target

The administrator verifies the drive UUID correct, and user1 confirms the drive should be mounted as My Documents in the home directory. Which of the following can the administrator

do to fix the issues with mounting the drive? (Select two).

Options:

A.

Rename the mount file to home-user1-My\x20Documents.mount.

B.

Rename the mount file to home-user1-my-documents.mount.

C.

Change the What entry to /dev/drv/disk/by-uuid/94afc9b2\-ac34\-ccff\-88ae\-297ab3c7ff34.

D.

Change the Where entry to Where=/home/user1/my\ documents.

E.

Change the Where entry to Where=/home/user1/My\x20Documents.

F.

Add quotes to the What and Where entries, such as What="/dev/drv/disk/by-uuid/94afc9b2-ac34-ccff-88ae-297ab3c7ff34" and Where="/home/user1/My Documents".

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Questions 120

Which of the following would significantly help to reduce data loss if more than one drive fails at the same time?

Options:

A.

Server clustering

B.

Load balancing

C.

RAID

D.

VDI

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Questions 121

An administrator needs to make an application change via a script that must be run only in console mode. Which of the following best represents the sequence the administrator should execute to accomplish this task?

Options:

A.

systemct1 isolate multi-user.targetsh script.shsystemct1 isolate graphical.target

B.

systemct1 isolate graphical.targetsh script.shsystemct1 isolate multi-user.target

C.

sh script.shsystemct1 isolate multi-user.targetsystemct1 isolate graphical.target

D.

systemct1 isolate multi-user.targetsystemct1 isolate graphical.targetsh script.sh

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Questions 122

A Linux systems administrator needs to add additional code to code that resides within a repository without changing the original code. Once completed, the additional code will be merged into the main branch. Which of the following commands should the administrator use first?

Options:

A.

git push

B.

git rebase

C.

git tag

D.

git clone

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Questions 123

An administrator is trying to terminate a process that is not responding. Which of the following commands should the administrator use in order to force the termination of the process?

Options:

A.

kill PID

B.

kill -1 PID

C.

kill -9 PID

D.

kill -15 PID

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Questions 124

Which of the following should be used to verify the integrity of a file?

Options:

A.

sha256sum

B.

fsck

C.

gpg —d

D.

hashcat

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Questions 125

NO: 55:

An administrator made a change to a system's network configuration. Which of the following best represents what the administrator should do to have the new configuration take effect?

Options:

A.

systemctl restart networkd

B.

systemctl enable networkd

C.

systemctl status networkd

D.

systemctl isolate networkd

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Questions 126

A Linux administrator receives a ticket stating that end users are unable to access the company’s internal cloud server. The administrator executes the following command:

bash

ping usl.com

Result:

ping: cannot resolve usl.com: Unknown Host

Which of the following files needs to be modified to allow end users to access usl.com?

Options:

A.

/etc/resolv.conf

B.

/etc/interfaces

C.

/etc/hosts.allow

D.

/etc/hostname

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Questions 127

The users of a Linux system are unable to use one of the application filesystems. The following outputs have been provided:

bash

$ cd /app

$ touch file

touch: cannot touch 'file': Readonly file system

Output 2

/dev/sdcl on /app type ext4 (ro,relatime,seclabel,data=ordered)

Output 3

/dev/sdcl /app ext4 defaults 0 0

Output 4

[302.048075] Buffer I/O error on dev sdcl, logical block 0, async page read

[302.048490] EXT4-fs (sdcl): Attempt to read block from filesystem resulted in short read while trying to re-open /dev/sdcl

Which of the following actions will resolve this issue?

Options:

A.

umount /app fsck -y /dev/sdcl mount /app

B.

xfs_repair /dev/sdcl mount -o rw,remount /app

C.

umount /app xfs_repair /dev/sdcl mount /app

D.

fsck -y /dev/sdcl mount -o rw,remount /app

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Questions 128

A systems engineer deploys a new application server, but the server cannot communicate with the back-end database hostname. The engineer confirms that the application server can ping the database server's IP address. Which of the following is the most likely cause of the issue?

Options:

A.

Incorrect DNS servers

B.

Unreachable default gateway

C.

Missing route configuration

D.

Misconfigured subnet mask

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Questions 129

NO: 20:

A hardened physical Linux system allows regular, unprivileged users to remotely connect to the server using SSH only. No sudo tool has been installed. Which of the following should the Linux administrator use to perform administrative tasks on this host? (Select two).

Options:

A.

Create an SSH key and copy it to the remote server to allow passwordless log-in.

B.

Access the server's physical console and use the root user’s password to log in.

C.

Install the telnet server on this system to be able to use a root account.

D.

Use the su command and enter the root user's password.

E.

Install the sudo command using the unprivileged user’s account.

F.

Add the user to the wheel group.

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Questions 130

A Linux administrator is trying to start the database service on a Linux server but is not able to run it. The administrator executes a few commands and receives the following output:

Which of the following should the administrator run to resolve this issue? (Select two).

Options:

A.

systemctl unmask mariadb

B.

journalctl —g mariadb

C.

dnf reinstall mariadb

D.

systemctl start mariadb

E.

chkconfig mariadb on

F.

service mariadb reload

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Questions 131

A systems administrator is configuring a Linux system so that network traffic from the internal network 172.17.0.0/16 going out through the eth0 interface would appear as if it was sent directly from this interface. Which of the following commands will accomplish this task?

Options:

A.

iptables -A POSTROUTING -s 172.17.0.0/16 -o eth0 -j MASQUERADE

B.

firewalld -A OUTPUT -s 172.17.0.0/16 -o eth0 -j DIRECT

C.

nmcli snasq-traffic eth0 -s 172.17.0.0/16 -j MASQUERADE

D.

ifconfig --nat eth0 -s 172.17.0.0/16 -j DIRECT

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Questions 132

A systems administrator receives the following message after running an ip link command to verify the status of a network interface named enp0s3:

state DOWN

Which of the following commands should the administrator use to resolve this issue?

Options:

A.

ip link set enp0s3 up

B.

ip link ifb enp0s3 up

C.

ip link add enp0s3 up

D.

ip link enp0s3 up

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Questions 133

A Linux systems administrator needs to compress a file named passwords.txt. The compressed file should be saved as passwords.txt.gz. Which of the following commands should the administrator use to accomplish this task?

Options:

A.

gzip -c passwords.txt > passwords.txt.gz

B.

gzip -d passwords.txt | passwords.txt.gz

C.

gzip -n passwords.txt > passwords.txt.gz

D.

gzip -n passwords.txt < passwords.txt.gz

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Questions 134

Users are reporting that a Linux server is responding slowly. A systems administrator troubleshooting the server issue sees the following:

# iostat -m 2

Linux 3.10.0-1160.66.1.el7.x86_64 (myhost) 10/19/2022 x86_64 (4 CPU)

avg-cpu: %user %nice %system %iowait %steal %idle

24.30 0.01 0.29 50.38 4.00 19.01

Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn

sdd 15.65 0.48 0.83 4936250 8513501

# df -h

Filesystem Size Used Avail Use% Mounted on

devtmpfs 16G 0 16G 0% /dev

tmpfs 16G 64K 16G 1% /dev/shm

/dev/mapper/root 35G 8.8G 26G 26% /

/dev/sda2 497M 144M 354M 29% /boot

/dev/mapper/tmp 10G 38M 10G 1% /tmp

/dev/mapper/var 15G 13G 2.2G 86% /var

/dev/mapper/varlib 650G 397G 254G 62% /var/lib

/dev/mapper/varlog 15G 9.5G 5.5G 64% /var/log

/dev/mapper/varaudit 15G 72M 15G 1% /var/log/audit

Which of the following is most likely the issue?

Options:

A.

The CPU is mostly waiting for I/O operations.

B.

/ filesystem does not have enough storage allocated.

C.

/var filesystem is almost full.

D.

The CPU capacity is inadequate.

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Questions 135

A Linux administrator is configuring a new internal web server fleet. The web servers are up and running but can only be reached by users directly via IP address. The administrator is attempting to fix this inconvenience by requesting appropriate records from the DNS team. The details are:

Hostname: devel.comptia.org

IP address: 5.5.5.1, 5.5.5.2, 5.5.5.3, 5.5.5.4

Name server: 5.5.5.254

Additional names: dev.comptia.org, development.comptia.org

Which of the following types of DNS records should the Linux administrator request from the DNS team? (Select three).

Options:

A.

MX

B.

NS

C.

PTR

D.

A

E.

CNAME

F.

RRSIG

G.

SOA

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Questions 136

A Linux administrator is implementing a stateful firewall on the Linux server. Which of the following iptables options will be required to build the stateful rules? (Select two).

Options:

A.

--name established

B.

-m recent

C.

-m conntrack

D.

--state

E.

--remove

F.

-j DROP

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Questions 137

A systems administrator is tasked with configuring a repository on an RPM-based Linux system. Which of the following need to be reviewed and modified? (Select two).

Options:

A.

/etc/yum.conf

B.

/etc/apt/sources.list.d

C.

/etc/pam.d

D.

/etc/apt.conf

E.

/etc/yum.repos.d

F.

/etc/ssh/ssh_config

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Questions 138

A systems technician needs to install a third-party software package. Which of the following commands would allow the technician to download this software package from a remote server?

Options:

A.

netstat

B.

nc

C.

telnet

D.

wget

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Questions 139

A DevOps engineer is working on a local copy of a Git repository. The engineer would like to switch from the main branch to the staging branch but notices the staging branch does not exist. Which of the following Git commands should the engineer use to perform this task?

Options:

A.

git branch -m st

B.

git commit -m staging

C.

git status -b staging

D.

git checkout -b staging

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Questions 140

An administrator is investigating the reason a Linux workstation is not resolving the website http://www.comptia.org. The administrator executes some commands and receives the following output:

XK0-005 Question 140

Which of the following is the most likely cause?

Options:

A.

The static entry needs to be removed from /etc/hosts.

B.

The remote website does not support IPv6, and the workstation requires it.

C.

The firewall needs to be modified to allow outbound HTTP and HTTPS.

D.

The nameserver in /etc/resolv.conf needs to be updated to 8.8.8.8

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Questions 141

The development team wants to prevent a file from being modified by all users in a Linux system, including the root account. Which of the following commands can be used to accomplish this objective?

Options:

A.

chmod / app/conf/file

B.

setenforce / app/ conf/ file

C.

chattr +i /app/conf/file

D.

chmod 0000 /app/conf/file

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Questions 142

Which of the following Git commands would send committed changes to a remote repository?

Options:

A.

git stash

B.

git commit -a

C.

git push origin master

D.

git add .

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Questions 143

Users report that they are unable to reach the company website https://www.comptia.org. A systems administrator confirms the issue with the following command:

# curl https://www.comptia.org

curl: (7) Failed to connect to www.comptia.org port 443: No route to host

The administrator logs in to the company’s web server to check its configuration and sees the following output:

root@comptia.org:-># firewall-cmd --list-all

public (active)

target: default

icmp-block-inversion: no

interfaces: dummy0 eth0

sources:

services: cockpit dhcpv6-client http ssh

ports: 3001/tcp

protocols:

forward: no

masquerade: no

forward-ports:

source-ports:

icmp-blocks:

rich rules:

rule family="ipv4" source address="61.177.173.6" port port="ssh" protocol="tcp" reject type="icmp-port-unreachable"

rule family="ipv4" source address="185.143.45.164" port port="ssh" protocol="tcp" reject type="icmp-port-unreachable"

rule family="ipv4" source address="143.198.60.41" port port="ssh" protocol="tcp" reject type="icmp-port-unreachable"

root@comptia.org:-># ip route

default via 172.31.1.1 dev eth0 proto dhcp src 65.21.187.65 metric 100

10.0.6.0/24 dev dummy0 proto kernel scope link src 10.0.6.65 metric 550

172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1

172.18.0.0/16 dev br-28ac2eaeeca1 proto kernel scope link src 172.18.0.1

172.19.0.0/16 dev br-fb3897555ca3 proto kernel scope link src 172.19.0.1 linkdown

172.31.1.1 dev eth0 proto dhcp scope link src 65.21.187.65 metric 100

192.168.224.0/20 dev br-e949ab177d79 proto kernel scope link src 192.168.224.1 linkdown

192.168.240.0/20 dev br-6adf72ac0ae3 proto kernel scope link src 192.168.240.1 linkdown

Which of the following is causing the issue?

Options:

A.

The web server's interface has no link.

B.

The default route on the web server is incorrect.

C.

HTTPS traffic is not allowed through the web server firewall.

D.

User IP addresses are rejected by the firewall.

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Questions 144

A Linux administrator tries to install Ansible in a Linux environment. One of the steps is to change the owner and the group of the directory /opt/Ansible and its contents. Which of the following commands will accomplish this task?

Options:

A.

groupmod -g Ansible -n /opt/Ansible

B.

chown -R Ansible:Ansible /opt/Ansible

C.

usermod -aG Ansible /opt/Ansible

D.

chmod -c /opt/Ansible

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Questions 145

A DevOps engineer wants to implement a new feature on the infrastructure as code configuration. Which of the following commands should the engineer use to accomplish this task?

Options:

A.

git pull

B.

git push

C.

git branch

D.

git tag

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Questions 146

Linux system users report that over the past few months, a server has stopped responding at least twice each day. Every time this happens, the users have to restart the server to recover it. A systems administrator diagnosing the issue collects the following outputs:

csharp

Output 1

[Tue Aug 31 16:36:42 2021] oom-killer invoked by java: gfp_mask=0x280da2 order=0, oom_score_adj=0

[Tue Aug 31 16:36:42 2021] java cpuset=/ mems_allowed=0

Output 2

[root@server]# free -m

total used free shared buff/cache available

Mem: 15819 15026 174 92 619 134

Swap: 0 0 0

Which of the following is the best permanent resolution for the system?

Options:

A.

More memory resources

B.

More CPU resources

C.

More network bandwidth

D.

Extended root filesystem

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Exam Code: XK0-005
Exam Name: CompTIA Linux+ Exam
Last Update: Jul 24, 2025
Questions: 487

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