Interview Questions.

Q1. How Do I Mirror A Logical Volume?

Mklvcopy LogicalVolumeName Numberofcopies

syncvg VolumeGroupName

Q2. How Will U Append A File To A Previous Archive Take By Tar?

#tar -cvf /dev/rmt0

Q3. How To Unlock User Account?

Chuser –a account=genuine username

Q4. What Are The Two States Of Installation?

Applied and devote state

In executed country if want to do any modifications on installed software then we can do

But in devote the adjustments aren't allowed to do. Once did installation.

A dedicated fileset replace can not be rejected.

Output from the installp -s command, that's used to get a listing of achieved software program program fileset updates and updates that are available to be each devoted or rejected.

Q5. How Will You Find Whether A Quorum Is Up Or Not?

# lsvg vg name

Q6. What Is Vgda, Vgsa?

VGDA: Volume Group Descriptor Area. It consists of the information about volume corporation to which the physical extent belongs to. It additionally includes the records about bodily walls, logical partitions and logical volumes.

VGSA: Volume Group Status Area it incorporates the statistics about physical partition from all physical volumes of the same volume company. It includes the recognition of VG.

Q7. How Can I Clone The Rootvg?

You can run the alt_disk_copy command to duplicate the current rootvg to an alternate disk. The following example suggests how togrep -i   (software_name)

Q9. What Is The Default Pp Size In Aix?

128MB

Q10. Types Of Installation?

New and complete overwrite

Migration

Preservation

Q11. How To Copy A Lv From One Vg To Another?

# cplv -v <new vm name> <sourcel name>

Q12. What Is Major Number?

A fundamental amount refers to a sort of device. A device quantity is a high range, and a minor amount specifies a particular tool of that kind or occasionally the operation mode of that device kind.

Q13. What Is The Command To Clear The Error Log?

# errclear

Q14. How Do I Get The Ip Address Of My Machine?

Type one of the following: ifconfig -a or host Fully_Qualified_Host_Name. For example, host cyclop.Austin.Ibm.Com.

Q15. How Do I Increase The Size Of A Logical Volume?

To boom the scale of the logical quantity represented via the lv05 listing via three logical walls, for instance, type extendlv lv05 3.

Q16. How Do U Take Backup Of File Systems?

#backup -f /dev/rmt0

Q17. How Many Vgs Can Be Created In A Lvm?

255 any no. Of vg can create.

Q18. How Will You Change Ltg Size?

#rmdev -l hdiskx

#chdev -l hdiskx -a max_trfer=zero*80000

#mkdev -l hdiskx

Q19. How Do I Create A Volume Group?

Use the subsequent command, wherein s partition_size units the wide style of megabytes (MB) in every physical partition in which the partition_size is expressed in devices of MB from one through 1,02@(It’s one via 131,072 for AIX five.3.)

mkvg -y name_of_volume_group -s partition_size list_of_hard_disks

The partition_size variable should be identical to a power of two (as an instance: one, , four or eight). The default charge for fashionable and large extent agencies is the lowest charge to stay in the task of 1,016 physical walls consistent with bodily quantity. The default cost for scalable extent companies is the bottom charge to cope with 2,040 physical partitions in step with physical quantity.

Q20. What Are The Error Levels Severity?

@eternal

@Temporary

@Informational

@Unknown.

Q21. What Are The Types Of Error?

1.H/W mistakes

@S/W error

@Operator errors

@Unknown blunders.

Q22. How Do I Create A Logical Volume?

#mklv -y name_of_logical_volume name_of_volume_group number_of_partition

Q23. How Can I Change The Characteristics Of A Volume Group?

You use the chvg command to trade the characteristics of a quantity institution.

Q24. What Are The Types Of Odm Database ?

Pre-described database PdDv, PdAt

Customised database CuDv, CuAt

Q25. How Will U Restore A File From Already Take Backup Using Backup?

#restore -xvqf /dev/rmt0

Q26. Odm Commands.

Odmcreate: To customise Odm

To eliminate ODM: odmdrop

odmdelete: To take away object from ODM

To see data in ODM  odmget

To exchange the fields in item class  odmchange

To upload object to ODM odmadd

Q27. How To Change A sixty 4 Bit Kernel To 32 Bit Kernel?

Modify the /usr/lib/boot/unix list and the /unix listing to be   a symbolic hyperlink to the binary for the preferred kernel.

Run the bosboot command to jot down down a modern-day system boot image.

Reboot the gadget.

The course name of the sixty four-bit kernel is /usr/lib/boot/unix_64, and the path name of the multiprocessor versions of the 32-bit kernel is

/usr/lib/boot/unix_mp.

# ln -sf /usr/lib/boot/unix_mp /unix

# ln -sf /usr/lib/boot/unix_mp /usr/lib/boot/unix

# lslv -m hd5

# bosboot -advert /dev/ipldevice

# shutdown -Fr

# bootinfo -K (have to now be 32)

Q28. What Is The Command To Increase The Size Of Error Log When It Is Full?

#usr/lib/errdemon –s ____ [ size ]

Q29. How Will You Unmirror A Vg If A Pv Gets Failed?

First test the blv report using,

# bootlist –m everyday –o

Remove the antique blv file, the use of

# chpv –c hdisk2

# bootlist –m regular hdisk1

# bootlist –m ordinary hdisk2

Now unmirrorvg

# unmirrorvg rootvg hdisk2

# reducevg rootvg hdisk2

#lsvg –p rootvg

# lspv

# bootlist –m normal –o

Q30. How Do I Display All Logical Volumes That Are Part Of A Volume Group (e,g, Rootvg)?

You can show all logical volumes which might be a part of rootvg with the aid of typing the following command: #lsvg -l rootvg/

Q31. How Will You Rename A Vg?

Unmount all filesystems in VG.

# umount /check (mount component call)

#varyoffvg datavg

#exportvg datavg0

Importvg with new call

# importvg –y newvg hdisk4

Q32. Two States Of Device Availability And Explain Them?

Available usa and described state. When tool is in defined nation it me it can not use. Not in geared up nation. Run cfgmgr try and make available recognized inside the machine that tool. Available state me that tool is prepared to use

# lsdev –Cc disk

It shows which disks are to be had

Q33. Where Does Log Files Resides?

AIX logs messages as specified in /and plenty of others/syslog.Conf document.

Q34. What Is The Command To See The Error Log?

# errpt –a

# errpt –d H [H/W]

# errpt –d S [S/W]

Q35. How Can I Display Or Set Values For Network Parameters?

The no command devices or presentations modern or next boot values for network tuning parameters

Q36. How To Change A 32 Bit Kernel To sixty four Bit Kernel?

To surely exchange the kernel to sixty four-bit from 32-bit, the device should be at the AIX® five.1 or AIX five.2levels.

# bootinfo –y

It shows a kernel is each 32-bit or sixty 4-bit.

To in truth change the kernel to sixty four-bit from 32-bit, the machine must be at the AIX® 5.1 or AIX five.2levels.

# bootinfo –y

It shows a kernel is each 32-bit or sixty four-bit.

To alternate to a 64-bit kernel, enter the subsequent commands:

# ln -sf /usr/lib/boot/unix_64 /unix

# ln -sf /usr/lib/boot/unix_64 /usr/lib/boot/unix

# lslv -m hd5

# bosboot -advert /dev/ipldevice

# shutdown -Fr

Q37. Difference Between Jfs & Jfs2?

JFS:

JFS is normal filesystem. We can not create huge files in JFS.

Files may be get proper of entry to dynamically.

Max record device length=1TB

Max file length=64GB

Inode size=128b

JFS2:-

Can create a massive length filesystems.

Files may be access as a result as required. (now not randomly or sequentially)

Max documents machine period=4PB

Max record length=4PB

Inode period=512

Q38. How To Enable & Disable Quorum?

# chvg –vy pv_name

# chvg –vn pv_name

#chvg –Qn vgname

#chvg –Qs vgname

Q39. How Will You Find The Inode Number?

# ls –li

# istat /and so forth/passwd

Q40. What Will You Do If A Disk Gets Failed?

Diag command

Q41. How Do I Identify The Network Interfaces On My Server?

Either of the following  instructions will display the network interfaces: lsdev -Cc if or ifconfig -a. To get information about one unique network interface, for eaxample tr0, run the command ifconfig tr0.

Q42. How Will You Reject A Committed Fileset?

# installp –r –g fileset name

Q43. Types Of Vg & Explain About Them?

Normal vg -32 pv, 256 lv

# mkvg –y normvg –s 128 hdisk4

Big vg :- 128pv,512lv

# mkvg -B –y bigvg –s 128 hdisk9

Scalable vg: -1024pv, 4096 lv

# mkvg –S –y scalvg –s  512 hdisk1

Q44. How Do I List Information About Logical Volumes?

Run the following command to reveal facts approximately the logical extent #lv1: lslv lv1.

Q45. How Do I Activate A Network Interface?

To activate the network interface tr0, run the command ifconfig tr0 up.

Q46. How Will You Create A File If A Disk Is Given To You?

#mkvg –y datavg –s 128 hdisk1 (pv name)

#mklv -y datalv –t jfs2 datavg 1

#crfs –v jfs2 –d datalv –g datavg –a period=10M –m /fs1

Q47. How Will You Change A Pp Size?

PP duration may be modified the usage of a T-thing. If now not then upload a partitions in VG thru such as one disk.

# chvg –t3 rootvg

Q48. Mirroring Concept?

Check disk length belong to vg , take  same length disk to mirror

# bootinfo –s hdisk2

#lsvg –p rootvg

Add one more disk of same length of already have disk having rootvg.

# extendvg rootvg hdisk2

# lsvg –p rootvg

Now reflect vg with ancient beyond sync LV. It sync LVs in ancient beyond with new LVs

# mirrorvg –s rootvg

Create a boot picture

# bosboot –ad /dev/hdisk2

#bosboot –advert /dev/hdisk1

Add a blv

document of newly added disk, first take a look at after which add.

# bootlist –m ordinary -o

#bootlist –m everyday hdisk2 hdisk1

Q49. How To Convert A Normal Vg To Big & Scalable Vg And Also Big To Scalable Vg?

#chvg –B vgname      /large vg

# chvg –S/-G vgname  /scale vg

Q50. How Do I Display Routing Table, Interface And Protocol Information?

To show routing desk facts for an Internet interface, kind netstat -r -f inet. To show interface records for an Internet interface, kind netstat -i -f inet. To show information for every protocol, type netstat -s -f inet.