Most frequently asked top Basic And Advanced IBM AIX interview questions and answers pdf with detailed explanation for competitive examination and entrance . + Ibm Aix Interview Questions and Answers, Question1: How do I know if my volume group is normal, big, or scalable? Question2: How do I create a volume. List of top 50 most frequently asked aix interview questions and answers pdf download free.
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Aix Interview Question and Answers - Download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online. Aix Interview Question and Answers. AIX Interview Preparation Basic AIX Questions Answer: boot the server with BOS Cd and go to maintenance mode, access the rootvg. AIX interview questions and answers for freshers and experienced - List of AIX questions with answers that might be asked during an interview - Brief about AIX, .
List group. Suppose we want to list oracle group information.
Change group. Remove group. Using rmgroup command we can remove a group, suppose we want to remove oracle group. User administration related files. The following files are referenced while doing user administration: Explain the backup and restore Process?
In this chapter we can do following things using backup and restore commands. Using backup and tar command to we can take full backup and incremental backup. Using tar command we can take normal backup, in this tar we cannot take day wise incremental backup. Using backup command we can take incremental backup, this backup command is particularly for AIX.
In this backup command we can specify the day 0 sun — 6 sat. Suppose you want to take Sunday backup then your command will be. Like this we can take normal and incremental backup in AIX. Using tar and restore command we can restore the data in server. Using tar command we can restore data to server, this is normal restore. Using restore command we can restore the data.
The tape data is restored in current directory. Like this we can restore the data in AIX. While you are taking rootvg backup you need to take only few things how will you take? This image. After the command execution rootvg backup created in tap, suppose OS got corrupted, that time we can restore the os from rootvg backup. While taking rootvg backup we can exclude unwanted file systems in backup process.
Suppose you not required following file systems in mksysb backup,. While creating the rootvg backup, first tape is spitted in to 4 blocks block size is First block has boot image. It is created by the bosboot command. Second block has following things, 1. The image. This file contains the. You can customize this file before issuing the mksysb command or use a. Third block has dummy toc file,. The dummy table of contents TOC is used so that the mksysb tape contains the. Fourth block has data, that is rootvg original data.
Restore rootvg backup. Using restore command we can restore the rootvg backup. Boot server with bos base operating system Cd, then go to maintenance mode and access the rootvg, then run the following command. Boot server with bos CD, then go to maintenance mode and initiate the rootvg backup one option available in maintenance mode. Like this we can restore the rootvg backup.
Backup the non rootvg backup. Using savevg command we can backup the non rootvg backup. Suppose your server has 3 volume groups. Now you want to take datavg backup, then your command will be. Datavg volume group is backup to tape. While taking restvg backup we can exclude unwanted file systems in backup process.
Restore the non rootvg backup. Using restvg command we can restore the non rootvg backup. After command execution datavg backup restored to server with same name while importing vg we can change the vg name. Rewind, Eject, Erase the tape. Using tctl command we can rewind, eject and erase the tape drive. All files will be with.
Now do the following steps. In a directory. You will execute inutoc. Represent current directory. It will create a. Here you will put. You will get the output. It showed ok now you can move to update the TL. Finally you press F3 to get back and change preview only option no, and Commit no. It will take 20 to 30 minute to update the TL, now you can check the file set installed successfully using lppchk —v ,.
And you check the oslevel -s, it will show the latest level of TL. LPAR Logical partitions. In single server we can install multiple operating systems, like AIX 5. The above Os are installing in single server, before that we have to partition the hardware resources, like processors and memory, Harddisk,.
Suppose one particular Os assigned for users that time we have to assign additional hardware resources to that partition, online we can assign the hardware resources using HMC. Accessing methods: How many types of LPAR. Which type of LPAR you are using?
Command to check the bos image. Cannot run a bit program on a bit machine. Or use: If it returns the string chrp the machine is. This command should return the following output: The AIX 5L has pre-configured kernels.
These are listed below for Power. Switching between kernel modes means using different kernels. This is simply.
Use symbolic links for this purpose. During boot AIX system runs the kernel. The base operating system bit runtime fileset is bos.
Role-specific IBM AIX Interview Questions & Answers:
Installing bos. Simply adding the load64bit line does not enable the bit environment. The command lslpp -l bos. The bos. If the bos. The syscalls64 extension must be loaded in order to run a bit executable. This is done from. You must load the syscalls64 extension even when running. To determine if the bit kernel extension is loaded, at the command line, enter genkex grep Information similar to the following displays: To change the kernel mode follow steps below: Create boot image.
Reboot AIX. Below lists the detailed actions to change kernel mode: To change to 32 bit uni-processor mode: To change to 32 bit multi-processor mode: To change to 64 bit multi-processor mode: If you are changing the kernel mode to bit and you will run.
This allows bit applications to run on the bit kernel.
Note that this. In AIX 5. The bit kernel, along with JFS2. It supports aix packages. Now if memory device is mem0, then type.
The smit. What is use of this hidden file? It is a hidden file in a user's home directory and must be owned either by the user executing the command or by the root user.
If the. Remove Device. Suppose you want to remove device from server. Suppose it is one HDD. First you have removed the HDD from server.
Then you checking device configuration details using. It will show the device status. There is two options is available in device removal. After executing the above command this hdisk5 configuration is not available in ODM. It wont display anything because device configuration is removed from ODM. Suppose you want to remove device from the server not from ODM. This case you should use the following command.
15 AIX Interview Questions and Answers
The above command is used to remove hdisk5 device from server, this device configuration is available in ODM not from OS.
After executing the above command this hdisk5 configuration is available in ODM and device status is defined. It will show Hdisk5 configuration details but device status is 0. If you want install hdisk5 device again, you should run the following command. After executing above commands the device hdisk5 become to Available state. And device status is 1.
The process that constitutes the majority of the init. Other processes typically dispatched by the. Run level: One to fourteen character field. Run Level: It the process does not exist, start the process. Do not wait for its termination. Restart the process if dies. Starts the process and wait for its termination. Starts the process and do not wait for termination.
If dies do not restart it. Starts the process during system start up. If terminates do not restart it. A shell command to execute. Power failure detection powerfail. Multiuser check rc. System Resource control srcmstr. Start NFS daemon rcnfs. Restart the inetd service. You can use the lquerypv command to find the LTG size for a physical disk. It is run daily as part of. The savebase command stores customized information for base devices for use during phase 1 of system boot.
During system initialization, servers with operator panel displays will show LED. Some codes. These codes depend on the type of server. For example, on a server with a four character display, E1F1 indicates that the. Codes in the form of Fxx, where xx is a. Other codes indicate that a fault has been detected. The most common LED. Table Common startup LEDs and solutions. LED - Damaged boot image. Access your rootvg by following the procedure described in 4.
If they are almost full, create more space. Determine the boot disk by using the lslv -m hd5 command. If such errors are found, it is.
Shut down and restart the system. LED - Invalid boot list. Set the key mode switch to service F5 for systems without keylock and power up.
If display continues normally, change the key mode switch to Normal and continue. If you do not get the prompt, go to step 4. When you get the login prompt, log in and follow the procedure described in 4. Continue with step 7. Follow the procedure in 4. Change the bootlist following the procedure given in 4. Shut down and restart your system. Follow the procedure described in 4. Volume Group Information screen.
Verify and correct the file systems as follows: Format the JFS log again by using the command: Use lslv -m hd5 to obtain the boot disk. Recreate the boot image using the command: Where n is the disk number of the disk containing the boot logical volume. Repeat steps 1 through 2 for LEDs , , and If fsck indicates that block 8 is corrupted, the super block for the file system is.
Enter the command: Rebuild your JFS log by using the command: If this solves the problem, stop here; otherwise, continue with step 5. Your ODM database is corrupted. Restart your system and follow the procedure. Mount the root and usr file systems as follows: Copy the system configuration to a back up directory: Copy the configuration from the RAM file system as follows: Unmount all file systems by using the umount all command. Save the clean ODM to the boot logical volume by using the command: Reboot, if the system does not come up, and reinstall BOS.
Access the rootvg with all file systems mounted by following the procedure. Check problems with: To create lv of jfs2 of lp size 2. Create Filesystem. File system that uses a journaled log for faster, more reliable data recovery.
Logical Partition LP. The LV is made up of LPs. The LP corresponds to 1 or more in the case of mirroring PPs. Logical Volume LV. Physical Partition PP. All physical volumes are subdivided into pps. PPs are all the same size. Physical Volume PV. Disk that is being managed by LVM. Default volume group created during installation. Volume Group VG. Area of storage that consists of one or more PVs.
Increases the size of a journaled file system by the addional number of byte blocks specified. Change the name of a logical volume it must be inactive. This command makes a logical volume, mount point with a journaled file system: Shows the disk usage of logical volumes on the server.
Adds a new physical volume to an existing volume group. Lists information about the logical volumes. The -l option lists the disks in the logical volume. Lists the disks on the server, including the physical volume will give details about that disk. The -l option will list the details of how the filesystems are distributed on the disk. Lists the volume groups on the server, including the volume group name will give details about that vg.
The -l option will list the logical volumes in the volume group. Lists each vpath and the hdisks that make up the vpath. Makes a logical volume in a volume group. Makes a volume group out of one or more physical volumes. Mounts the file system for use. Removes a physical volume from a volume group. Removes a logical volume it must be inactive. Unmounts the filesystem. Procedure to create a filesystem using JFS: Procedure to extend the size of filesystem using JFS: If there are not enough free pp's then see below for procedure to add a disk to a volume group.
Growing the file system will automatically grow the logical volume. Troubleshooting extending the size of a filesystem using JFS: Procedure to remove a file system. Unmount the filesystem. Procedure to reduce the size of a file system - shareold is 8mb and needs to be reduced to 4mb.
Create the file system. Mount the volume. Unmount the file systems. Remove the old file system and it's logical volume. Mount the new filesystem. Delete the temporary mount point. Procedure to create a logical volume and filesystem in a volume group using JFS: When might the savebase command be used? What key would you use at boot time to signal the machine to boot into service mode?
What is the effect of setting the normal mode bootlist to cd0 first and hdisk0 second? A machine hangs at boot because the network is inaccessible or an NIS server is accessible. How can you recover? How does cfgmgr operate different when configuring each? After a reboot or after running cfgmgr, a particular disk is listed twice. Give some possible reasons why and how you might narrow them down. How do you properly mirror rootvg to protect the OS from crashing should a disk fail? Why is it important to mirror non-rootvg paging spaces, and what might be the effect if this is not done?
What kind of considerations can be made with regard to mirroring rootvg in a non-mission critical environment where maximizing disk space is important? You cant unmount a file system AIX says its in use.
15 AIX Interview Questions and Answers
How do you determine what process is keeping it open? Why, and how do you debug this? How is this possible?
What steps should you follow to replace a failed hdisk? Basic network configuration How do you get around this? Youve properly exported a file system on a server. Youve properly set up the NFS file system definition on the client, and the proper daemons are running. What two options do you have to resolve this? What is resolv. Your machines are in the xyz. You want to be able to look up hosts in the abc. What should you do so that the ping command will find a route to those hosts?
Where is the default gateway stored in AIX? Where are other routes stored? How would you use SMIT to create scripts for future use? Youre using SMIT and are getting a strange error during its execution.
How do you debug what SMIT is doing? A project manager claims that a system is CPU-bound.
What commands do you run to verify this, and what sort of output are you looking for?What Is Vgda, Vgsa? Check problems with: This info is valid for AIX 4. Unmounts the filesystem. Volume Group Descriptor Area. How is this possible? T — Factor? Unix makefile Tutorial.
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