S1000-007 IBM AIX v7 Administrator Specialty Questions and Answers

The mlcvterm command is used to open a console to an AIX virtual machine that is controlled by a Hardware Management Console (HMC). According to the IBM AIX v7 Administrator Specialty Study Guide, the mlcvterm command allows you to open a terminal window to the console of a logical partition (LPAR) running AIX.

The procedure to check which system tunables have been changed in the system since last boot is to run the 'lstuncfg -1 | grep -v DEFAULT' command. The lstuncfg command is used to display the current configuration of the system tunables. By using the '-1' option, the command will display the system tunables and whether they have been changed since the last system reboot. The 'grep -v DEFAULT' command will filter out the default values, allowing you to see only the tunables that have been changed. This command is available on IBM AIX v7 systems and is documented in the IBM AIX v7 Administrator Specialty Study Guide. For more information, please see the IBM documentation at  https://www.ibm.com/support/knowledgecenter/ssw_aix_72/com.ibm.aix.cmds2/lstuncfg.htm.

The root user is not required to run SMIT, and the size of the window is the only factor that determines the minimum output display requirements. According to the IBM AIX v7 Administrator Specialty Study Guide (page 9-3), SMIT requires 24 lines and 80 columns for the output display for successful execution.

The error message 1800-005 SMIT requires a minimum of 24 line by 80 column output display indicates that the terminal window does not meet the minimum size requirements for running smit . To resolve this, the user needs to resize their terminal window to at least 24 lines by 80 columns. Ensuring the terminal meets this size requirement will allow smit to display its interface properly. References : IBM AIX Documentation – SMIT

The administrator has failed to run the cfgmgr command before rebooting the systems. Running the cfgmgr command before rebooting a system is important, as it ensures that any changes made to the configuration are written to the system, otherwise the changes may be lost when the system is rebooted. Other commands such as chdev and route add are not related to this issue and will not solve the problem.

For more information on the cfgmgr command, please refer to the IBM AIX v7 Administrator Specialty Study Guide, page 10-7. The guide can be found here: https://www.ibm.com/support/knowledgecenter/en/ssw_aix_72/cfgmgmt/cfgmgr_command.htm.

In the /etc/exports file, the absence of specific permissions next to the /tmp directory implies that it is exported with the default read-write permissions. The /data directory has -ro specified, indicating read-only permissions, and /usr/man has -root=client1 , giving root access to client1 with default read-write permissions. Since no special permissions are indicated for /tmp , it retains the default read-write permissions. References : IBM AIX NFS Documentation

The cfgmgr command updates the system configuration database with the current configuration of the devices attached to the system. When the SAN administrator increases the size of a LUN device (hdisk), it is not automatically reflected on the AIX LPAR. Running the cfgmgr command updates the system with the new size information and makes it visible to the system administrator.

According to the IBM AIX v7 Administrator Specialty Study Guide, the lsmcode command is used to list the microcode of the system. The -A flag is used to list the microcode level and the active microcode level of the system. This command can be used to confirm the system firmware level which is required to use the IBM Fix Level Recommendation Tool (FLRT).

The lsfs command in AIX gets its information from the /etc/filesystems file. This file contains definitions of all file systems and their attributes, including mount points, device names, and mount options. The lsfs command reads this information to display details about the file systems on the system. References := IBM AIX Documentation

The /etc/motd (Message of the Day) file is used to display a message to all users upon logging in to the server. When configured, this file ensures that the specified message is shown to users who access the server via SSH or other login methods. References := IBM AIX Documentation

The default Maximum Transmission Unit (MTU) size of a network adapter in AIX is 1500 bytes. The MTU size determines the largest packet size that can be transmitted over the network. Setting an appropriate MTU size is essential for optimizing network performance and minimizing fragmentation. References := IBM AIX Network Adapter Documentation

In AIX, the installp command is used for installing software packages, including RPM packages. If the rpm command is not installed, installp can be used to install the RPM Package Manager, allowing the user to manage RPM packages thereafter. The other options, such as instfix , yum , and rpm , either serve different purposes or cannot be used if rpm itself is missing. References := IBM AIX Documentation

The error message indicating a refused connection operation suggests that the nimsh subsystem on the NIM client may not be active. The administrator should check the status of the nimsh subsystem and start it if necessary. This ensures that the NIM master can communicate with the client to perform software updates. The other options do not directly address the issue related to the nimsh connection. References := IBM AIX Documentation

The vmstat -s command in AIX displays various system statistics since the last reboot, including the cumulative count of paging space page outs and free frame waits. This command provides detailed system performance information, which helps in diagnosing memory and paging issues. Other commands listed, such as ps guw , svmon -G , and ioo -L , do not provide cumulative counts of these specific metrics. References := IBM AIX Documentation

The no -a command in AIX displays the current values of all network options, including those related to TCP/IP packet routing. This command helps the administrator to verify if the system is configured for packet routing across multiple networks. The other commands listed do not provide information related to TCP/IP packet routing settings. References := IBM AIX Documentation

The rpm command is used to install, update, and manage packages from the AIX Toolbox for Linux Applications. This toolbox provides GNU and open source tools for AIX, and the rpm command handles the package management of these tools. References := IBM AIX Toolbox for Linux Applications

The logical volume datalv has 30 Logical Partitions (LPs), each of 1024 megabytes (MB), or 1 gigabyte (GB). Therefore, the total usable size of the logical volume is 30 LPs * 1 GB per LP = 30 GB. References := IBM AIX Documentation

This error indicates that the maximum number of logical partitions for the logical volume is set to 256 and needs to be increased in order to allow the file system to be extended. From the IBM AIX v7 Administrator Specialty Study Guide: "The 0516-787 error indicates that the maximum number of logical partitions for the logical volume is set to 256, and needs to be increased in order to allow the file system to be extended."

The account name "adm" is a standard account that comes pre-installed with AIX. It is used for system administration tasks and has specific roles and permissions associated with it. Attempting to create a new account with the same name would conflict with the existing standard account, hence it cannot be used for creating a new user account. References := IBM AIX Documentation

The RES_TIMEOUT and RES_RETRY parameters in the /etc/environment file are related to DNS resolution. RES_TIMEOUT sets the initial timeout period for DNS queries, and RES_RETRY specifies the number of times to retry a query before giving up. By setting RES_TIMEOUT=1 and RES_RETRY=1 , the system will quickly failover to the secondary name server if the primary name server does not respond within one second, thus reducing the failover time. References : IBM AIX Documentation - /etc/environment

The mount -a command in AIX mounts all file systems that are specified in the /etc/filesystems file and have the attribute mount=true . This ensures that only those file systems that are configured to be automatically mounted are actually mounted when this command is executed. It does not mount all defined file systems, only those marked for automatic mounting. References : IBM AIX Documentation – mount

When a user logs in, the system will process their .profile file which contains the PATH variable. This variable specifies the list of directories that the system will search through to locate executable files. If the PATH variable contains non-existent directories, then it will take longer for the system to process the .profile file, resulting in a slower login experience. Reference: IBM AIX v7 Administrator Specialty Study Guide (page 9-10).

The two connection methods supported for a NIM master to initiate operations on a NIM client are nimsh and rsh . The nimsh (NIM shell) is a secure and efficient method, while rsh (remote shell) is an older, less secure method. Both are used for remote command execution and communication between the NIM master and clients. References := IBM AIX NIM Documentation

The reclstat command is used to obtain information about the space reclamation requests generated by the Logical Volume Manager (LVM). This command provides details on space reclamation activities, helping administrators manage and optimize disk space utilization. References := IBM AIX reclstat Command Documentation

An EtherChannel network device provides network redundancy and load balancing by combining multiple physical network adapters into a single logical interface. If one adapter fails, traffic will automatically flow through the other available adapters in the channel, ensuring continuous network availability. References := IBM AIX EtherChannel Documentation