S1000-007 IBM AIX v7 Administrator Specialty Questions and Answers

Thesmit.scriptfile records all commands executed through SMIT (System Management Interface Tool). By checking this file, the administrator can find the exact command that was run previously. This log file is useful for auditing and replicating commands executed via SMIT.References:= IBM AIX Documentation

The logical volumedatalvhas 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

To unconfigure a device and remove its definition from the Customized Devices object class in AIX, the commandrmdev -dl rmtOis used. The-doption indicates the removal of the device definition, and the-loption specifies the logical name of the device. This command ensures that both the device configuration and its definition are deleted from the system.References:= IBM AIX Documentation

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

To upgrade from one release of AIX to another (such as from AIX 7.1 to AIX 7.2), the recommended method is a Migration Install. This method allows the administrator to upgrade the operating system while preserving existing data and settings. It updates the existing AIX installation to the new version, ensuring compatibility and continuity of system configurations and installed applications. The other methods, such as Preservation Install, New and Complete Overwrite Install, and Update Install, are either not suitable for upgrading to a new release or would result in data loss or incomplete updates.References:= IBM AIX Documentation

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

In AIX, error entries related to a system crash are preserved by writing them to Non-Volatile Random Access Memory (NVRAM). These entries are processed and logged to the system error log when the system comes back up. This ensures that critical error information is not lost during a system crash.References:= IBM AIX Documentation

To resolve the issue with the power supply, the administrator should rundiagwith the option to log the repair action. This command will allow the system to acknowledge the hardware replacement and update the hardware error log, thus preventing further false reports regarding the power supply problem.References:= IBM AIX Diagnostic Documentation

Mirror pools in AIX allow administrators to define specific sets of disks that can be used for mirroring logical volumes. This feature provides greater control over the allocation of mirror copies, ensuring that each copy is placed on separate, specified disks to improve data redundancy and reliability. This setup helps in managing disk utilization and performance more efficiently. The other options do not accurately describe the primary benefit of mirror pools.References:= IBM AIX Documentation

In the/etc/filesystemsfile, theautoattribute can be set tonoto prevent the automatic mounting of NFS filesystems during system startup. This ensures that the system does not attempt to mount NFS filesystems, thereby avoiding potential hangs during network outages.References:= IBM AIX Documentation

The error message indicating a refused connection operation suggests that thenimshsubsystem on the NIM client may not be active. The administrator should check the status of thenimshsubsystem 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 thenimshconnection.References:= IBM AIX Documentation

Devices that are connected to the system can be in one of four states.

Devices that are connected to the system can be in one of the following states:

Item

Description

Undefined

The device is unknown to the system.

Defined

Specific information about the device is recorded in the customized database, but it is unavailable to the system.

Available

A defined device is coupled to the operating system, or the defined device is configured.

Stopped

The device is unavailable but remains known by its device driver.

If a tty device and a printer alternately use the same tty connector, both a tty device and a printer are defined on the same parent and port in the device configuration database. Only one of these devices can be configured at a time. When the tty connector is configured, the printer specific setup information is retained until it isconfigured again. The device is not removed; it is in the defined state. Maintaining a device in defined state retains customized information for a device that is not currently in use, either before it is first made available or while it is temporarily removed from the system.

If a device driver exists for a device, the device can be made available through the device driver.

https://www.ibm.com/docs/en/aix/7.2?topic=nodes-device-states

Thevtmenucommand in an HMC SSH session is used to display a menu of all managed systems and their LPARs. This menu provides options to open virtual terminal sessions to these LPARs, making it easy for administrators to monitor the boot process and manage their AIX partitions. Other commands likemkvtermopen a console for a specific partition, butvtmenuis designed to list all and provide an interface for selection.References: IBM HMC Documentation

The RES_TIMEOUT and RES_RETRY parameters in the/etc/environmentfile are related to DNS resolution.RES_TIMEOUTsets the initial timeout period for DNS queries, andRES_RETRYspecifies the number of times to retry a query before giving up. By settingRES_TIMEOUT=1andRES_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

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 shutdown command is used to shut down a system in an orderly manner. When used with the '-Fr' option, it will perform a graceful shutdown and reboot of the LPAR. This command is available onIBM AIX v7 systems and is documented in the IBM AIX v7 Administrator Specialty Study Guide. The syntax for the command is "shutdown -Fr", where the '-F' option indicates that the system should be rebooted after shutdown and the '-r' option indicates that the system should be rebooted. For more information, please see the IBM documentation at https://www.ibm.com/support/knowledgecenter/ssw_aix_72/com.ibm.aix.cmds3/shutdown.htm.

Theshutdowncommand is used to perform a graceful shutdown and reboot of an AIX LPAR. This command ensures that all processes are properly terminated, filesystems are synced, and the system is cleanly brought down before rebooting. It is preferred overhaltandrebootbecause it allows for a controlled and orderly shutdown process.References: IBM AIX Documentation – shutdown

Amksysbimage can be used to boot an AIX system and perform maintenance tasks. However, when using Network Installation Management (NIM), the administrator may need to create a SPOT (Shared Product Object Tree) resource from themksysbimage. The SPOT resource provides the necessary boot files and maintenance environment to boot the client system and perform the required tasks, such as varying on therootvgand troubleshooting the issue.References: IBM AIX NIM Documentation

"The command to limit root user access to only members of the group called system is chadmin group=system root. This command will set the primary group of the root user to the system group, thereby limiting root user access to only members of that group. This command can be used to set any user's primary group, not just root." The source of this information is the IBM AIX v7 Administrator Specialty Study Guide.

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.

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 message1800-005 SMIT requires a minimum of 24 line by 80 column output displayindicates that the terminal window does not meet the minimum size requirements for runningsmit. 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 allowsmitto display its interface properly.References: IBM AIX Documentation – SMIT

The "lslpp" command can be used to display information about filesets installed on an AIX system. To determine which files are included in the "useful_fileset" fileset, the administrator can run the following command:

lslpp -f useful_fileset

This command will display detailed information about the "useful_fileset" fileset, including a list of the files that are included in the fileset. This information can be useful for verifying the installation of the fileset and for troubleshooting problems that may be related to the fileset.

When using the connect=shell option, a successful NIM operation requires that the root user on the NIM client has an entry in its .rhosts file for the NIM master, and that the file permissions are set to 600. This is documented in the IBM AIX v7 Administrator Specialty Study Guide. More information on this can be found at https://www.ibm.com/support/knowledgecenter/en/ssw_aix_72/com.ibm.aix.security/nim_security.htm.

Themlcvtermcommand 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, themlcvtermcommand allows you to open a terminal window to the console of a logical partition (LPAR) running AIX.

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.