S1000-007 Questions and Answers

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 /etc/hosts file is used by the system for local name resolution on the server, so if the IP address of the server has been changed, but the /etc/hosts entry has not been updated, the ping command will fail. This is explained in the IBM AIX v7 Administrator Specialty Study Guide, under the topic "Using the mktcpip Command".

"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.

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.

In AIX, console log messages are recorded using thealogcommand. Thealogutility manages log files, including the console log, which captures system messages and output sent to the console. This utility provides a means to view and manage these logs for diagnostic and auditing purposes.References: IBM AIX Documentation – alog

The istat command displays information about the inode of a file, including the last access time. This command is available on IBM AIX v7 systems and is documented in the IBM AIX v7 Administrator Specialty Study Guide. The syntax for the command is "istat file", where 'file' is the path to the file you would like to check. For more information, please see the IBM documentation at https://www.ibm.com/support/knowledgecenter/ssw_aix_72/com.ibm.aix.cmds2/istat.htm.

Theistatcommand in AIX provides detailed information about a file's inode, including the last access time, modification time, and change time. This command is useful for administrators who need to track file usage and access patterns. By runningistat file, one can see when a file was last accessed.References: IBM AIX Documentation – istat

This code indicates that the rootvg will not varyon, and performing a maintenance boot allows the administrator to diagnose the issue and fix it. From the IBM AIX v7 Administrator Specialty Study Guide: "When the system is halted with a reference code 551, the rootvg will not varyon and the system will not boot. The administrator must perform a maintenance mode boot to diagnose the problem."

The System Resource Controller (SRC) is the main process that starts other background processes when the system boots. It is started through the /etc/rc.srcmstr script which is run by the init process. This script reads the /etc/inittab file and starts the necessary processes. Reference: IBM AIX v7 Administrator Specialty Study Guide.

The System Resource Controller (SRC) in AIX is started by the script/etc/rc.srcmstr. This script initializes and starts the SRC daemon (srcmstr), which manages subsystems, subsystem groups, and subsystem processes. It is a critical part of the AIX startup process, ensuring that necessary systemservices are properly managed.References: IBM AIX Documentation - System Resource Controller

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."

To apply changes to the inter-disk policy for all logical volumes within a volume group, thereorgvgcommand is used. This command reorganizes the physical partitions within the volume group according to the new policy, helping to balance the I/O load and avoid disk hot spots while preserving the existing data.References:= IBM AIX Documentation

After connecting to the Hardware Management Console (HMC) via SSH, thevtmenucommand allows the administrator to open a console session to an AIX virtual machine. This command provides a menu-driven interface for accessing virtual terminal sessions of managed logical partitions.References:= IBM AIX Documentation

Thevmstat -scommand 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 asps guw,svmon -G, andioo -L, do not provide cumulative counts of these specific metrics.References:= IBM AIX Documentation

Thereclstatcommand 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

When a file system corruption error is reported in the system error log, the appropriate action is to check the error log for specific details, unmount the affected file system, and run thefsck(file system check) command. This command checks and repairs inconsistencies and errors in the file system, which can help resolve the corruption issue. It is essential to unmount the file system before runningfsckto avoid further data corruption.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

If an administrator does not receive a console login prompt after booting a system, two potential reasons could be:

Inittab entries before the console login have not completed running. The/etc/inittabfile controls the initialization process, and if prior entries are hanging or taking a long time to complete, it can prevent the console login from appearing.

There is no console entry in the/etc/inittab. The absence of a console entry means the system does not know to start a console login process, which would prevent the login prompt from appearing. Other reasons like full file systems, rezoned disks, or overwritten rootvg could cause system issues but would not specifically prevent the console login prompt from appearing if the system is running.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

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

In AIX, the number of virtual CPUs assigned to a Logical Partition (LPAR) determines its potential access to CPU resources. Virtual CPUs represent the CPU capacity that the LPAR can use, but they rely on physical CPUs to process workloads. The more virtual CPUs an LPAR has, the greater its access to CPU time, but they must be backed by physical CPU resources.References:= IBM AIX Documentation

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

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

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