81⟩ How will you change a PP size?
PP size can be changed using a T-factor. If not then add a partitions in VG by adding one disk.
# chvg -t3 rootvg
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116 AIX Questions And Answers
82⟩ How will you rename a VG?
☆ Unmount all filesystems in VG.
☆ # umount /test (mount point name)
☆ #varyoffvg datavg
☆ #exportvg datavg0
☆ Importvg with new name
☆ # importvg -y newvg hdisk4
83⟩ What is the default PP Size in AIX?
128MB
84⟩ What is major number?
A major number refers to a type of device. A device number is a major number, and a minor number specifies a particular device of that type or sometimes the operation mode of that device type.
85⟩ What will you do if a disk gets failed?
diag command
86⟩ What are the types of error?
☻ H/W error
☻ S/W error
☻ Operator error
☻ Unknown error.
87⟩ What are the error levels severity?
☻ permanent
☻ Temporary
☻ Informational
☻ Unknown.
88⟩ How to enable & disable quorum?
# chvg -vy pv_name
# chvg -vn pv_name
#chvg -Qn vgname
#chvg -Qs vgname
89⟩ What is the command to see the error log?
# errpt -a
# errpt -d H [H/W]
# errpt -d S [S/W]
90⟩ What is the command to clear the errorlog?
# errclear
91⟩ How to change a 64 bit kernel to 32 bit kernel?
☛ Modify the /usr/lib/boot/unix directory and the /unix directory to be a symbolic link to the binary for the desired kernel.
☛ Run the bosboot command to write a new system boot image.
☛ Reboot the system.
The path name of the 64-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 -ad /dev/ipldevice
☛ # shutdown -Fr
☛ # bootinfo -K (should now be 32)
92⟩ How many VGs can be created in a LVM?
255 any no. of vg can create.
93⟩ How to change a 32 bit kernel to 64 bit kernel?
To truly change the kernel to 64-bit from 32-bit, the system must be at the AIX® 5.1 or AIX 5.2levels.
# bootinfo -y
It shows a kernel is either 32-bit or 64-bit.
To truly change the kernel to 64-bit from 32-bit, the system must be at the AIX® 5.1 or AIX 5.2levels.
# bootinfo -y
It shows a kernel is either 32-bit or 64-bit.
To change to a 64-bit kernel, enter the following commands:
# ln -sf /usr/lib/boot/unix_64 /unix
# ln -sf /usr/lib/boot/unix_64 /usr/lib/boot/unix
# lslv -m hd5
# bosboot -ad /dev/ipldevice
# shutdown -Fr
94⟩ What are the two states of installation?
❀ Applied and commit state
❀ In applied state if want to do any changes on installed software then we can do.
❀ But in commit the changes are not allowed to do. Once did installation.
❀ A committed fileset update cannot be rejected.
❀ Output from the installp -s command, which is used to get a list of applied software fileset updates and updates that are available to be either committed or rejected.
95⟩ 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
96⟩ What is the latest OS level?
#oslevel -rq
97⟩ How do you find history of a file set?
#lslpp -h
98⟩ How to remove a failed package installation?
#installp -C
99⟩ How will you check whether software is installed or not?
# lslpp -L |grep -i (software_name)
100⟩ How will you reject a committed fileset?
# installp -r -g fileset name
