Which of the following server roles utilize a heartbeat/polling process? (Choose two.)
A new HTTPS web service is being deployed on a server. Which of the following commands should the Linux administrator use to ensure traffic is able to flow through the system firewall to the new service?
A Linux administrator needs to add some files in a directory to the Git repository but must exclude some local
.tmp files that are occasionally created by the scripts.
Which of the following is the BEST way to accomplish this task?
A Linux administrator has configured a Linux system to be used as a router. The administrator confirms that two network adapters are properly installed and functioning correctly. In addition, the output of the iptables –L command appears to contain a complete firewall configuration.
Which of the following commands does the administrator need to issue for the router to be fully functional?
A systems administrator needs to conduct maintenance on a server.
Which of the following commands will place the administrator in the appropriate runlevel?
A junior Linux administrator is updating local name resolution to support IPv6. The administrator issues the command cat /etc/hosts and receives the following output:
Which of the following actions should the administrator perform to accomplish this task?
A Linux administrator recently reprovisioned a new corporate web server to replace a legacy one. To minimize
the impact on the company's users, the administrator modified the network and DNS settings of the new server
to be the same as the legacy server.
When attempting to log in to the new server remotely over SSH, the following error message is displayed:
WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!
Which of the following should the administrator do to resolve the issue?
An administrator is trying to optimize a connection to an off-site NFS server.
Which of the following commands would BEST display the problems with packet sizes between hops on the network?
A Linux administration is using a Linux system as a router. During the tests, the administrator discovers that IP packets are not being sent between the configured interfaces.
Which of the following commands enables this feature for IPv4 networks?
A Linux systems administrator needs to provision multiple web servers into separate regional datacenters. The systems architect has instructed the administrator to define the server infrastructure using a specific tool that consumes a text-based file.
Which of the following is the BEST reason to do this?
Which of the following boot methods can a Linux administrator use to boot a Linux server remotely via a
network interface card instead of a local disk?
A security team informs the Linux administrator that a specific server is acting as an open relay.
To which of the following is the security team referring?
A junior systems administrator needs to schedule a backup script named /scripts/backup.sh and make
the correct changes to the crontab.
Which of the following crontab entries would run the script every Monday at 2:05 a.m.?
An administrator needs to generate a list of services that are listening on TCP and/or UDP ports. Which of the following tools should the administrator use?
A Linux system is running normally when the systems administrator receives an alert that one application spawned many processes. The application is consuming a lot of memory, and it will soon cause the machine to become unresponsive. Which of the following commands will stop each application process?
A user has connected a Bluetooth mouse to a computer, but it is not working properly. Which of the following commands should the systems administrator use to fix the issue?
A junior systems administrator is diagnosing an issue with latency. The administrator issues the command mtr www.comptia.org at a terminal and receives the following output:
Given this scenario and the output, which of the following should be reported to the network team for investigation? (Choose two.)
The development team has automated their software build process so each time a change is submitted to the source code repository, a new software build is compiled. They are requesting that the Linux operations team look into automating the deployment of the software build into the test environment. Which of the following is the benefit to the development team for implementing deployment automation?
A Linux administrator needs every new file created on a directory to maintain the group permissions of the same directory. Which of the following commands would satisfy this requirement?
Which of the following would be the BEST solution for a systems administrator to access the graphical user environment of a Linux machine remotely?
A user cannot write files to the /home/user directory. The junior Linux administrator runs the following commands:
Which of the following BEST represents why the user cannot write files?
An administrator needs to kill the oldest Bash shell running in the system. Which of the following commands
should be issued to accomplish this task?
A systems administrator wants to disable the Linux Kernel WatchDog Timer Driver for security purposes.
Which of the following will accomplish this task?
Joe, a user, reports that he is no longer able to write files to his home directory. Upon inspection, the Linux
administrator discovers that attempting to create a new file gives the following error: No space left on device. However, the disk and partition are not full. Which of the following commands would be BEST for the administrator to use to continue troubleshooting this problem?
An analyst is trying to determine which public IP addresses are managed by Company A, but the script is not working correctly.
Which of the following explains what is wrong with the script?
A junior administrator of a physical server receives log messages indicating the out-of-memory killer has been active. All memory slots are in use on the motherboard, but additional disk space is available. Space has been allocated for a swap file.
Which of the following should the administrator use to reduce the output of memory messages?
A systems administrator downloads an application’s source files, compiles the application, and installs it per
the application’s installation instructions. When trying to run the application, the system states:
bash: occmd: command not found…
Running the locate command shows it does exist in the following location:
Which of the following should the administrator do to allow the command to run properly? (Choose two.)
A technical support engineer receives a ticket from a user who is trying to create a 1KB file in the /tmp directory and is getting the following error No space left on device. The support engineer checks the /tmp directory, and it has 20GB of free space.
Which of the following BEST describes a possible cause for this error?
A junior systems administrator is scanning archive.tar files with an antivirus scanner. The administrator is given the following tasks:
Which of the following actions should be performed to meet these requirements? (Choose two.)
An administrator is attempting to block SSH connections to 192.168.10.24 using the Linux firewall. After implementing a rule, a connection refused error is displayed when attempting to SSH to 192.168.10.24.
Which of the following rules was MOST likely implemented?
A Linux storage administrator wants to create a logical volume group. Which of the following commands is required to start the process?
Which of the following is modified to reconfigure the boot environment?
A Linux administrator is setting up a testing environment and needs to connect to a separate testing server using the production server name. The administrator needs to override the hostname that the DNS is returning in order to use the test environment. Which of the following commands should be run on each of the testing systems to BEST meet this goal?
A user wants to use terminal services from a Windows workstation to manage a Linux server. Which of the following should be installed on the Linux server to enable this functionality?
A customer reports a Linux production server is randomly suffering degraded performance. The administrator verifies that the sysstat package is installed and enabled on the server.
Which of the following would BEST determine what is causing the impact on performance?
An administrator is tasked with increasing the size of the volume /dev/vg/lv to 20GB. Which of the following BEST illustrates the steps the administrator should take?
A directory called /employee is shared with many employees in a company. New hardware was acquired, and the systems administrator needs to back up all files in /employee before the server is replaced.
Which of the following commands should be used to back up all the files and compress them to use little space in the filesystem?
An administrator notices the HISTSIZE variable is 50, using the commands below:
The administrator rechecks the HISTSIZE value using echo HISTSIZE but gets no value. Which of the
following commands should the administrator use to retrieve its value?
Which of the following commands would show the default printer on a Linux system?
A Linux administrator is using a public cloud provider to host servers for a company’s website. Using the provider’s tools, the administrator wrote a JSON file to define how to deploy the servers. Which of the following techniques did the administrator use?
A user tries to log in to the Linux console and receives the following message:
Your account has expired; Please contact your system administrator.
Which of the following commands was MOST likely run to create this behavior?
Which of the following commands allow an administrator to determine if the current system is a virtual machine?
A Linux systems administrator is troubleshooting an issue with the /home directory running out of space. The
administrator needs to determine which /home directories are using the most space. Which of the following
commands should be used?
An operator finds a user is having issues with opening certain files.
Which of the following commands would allow the security administrator to list and check the SELinux context?
A Linux administrator wants to configure log messages of critical or higher severity levels from the cron utility to be logged to the console. Which of the following will accomplish this objective?