IBM AIX Interview Question:

How to change a 64 bit kernel to 32 bit kernel?

Submitted by: Muhammad

☛ 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)
Submitted by: Muhammad