More often than not, we UNIX Administrators like our OS and data files have a good and trusted backup of all our files. But let us accept it there are really files or filesystems that really do not need to be backed up and they would just take up some space on our very expensive tapes (and of course backup time).
An application user asks to kill all the processes under their application account. When you checked on the box itself you saw a lot of processes and killing them one by one would take forever.
We are now going to discuss extending a filesystem under JFS on AIX machine. It is really pretty simple, actually in just 3 commands (including the checking) we could easily extend an AIX filesystem. But for the benifit of everybody, I would include extra checking and commands for us to fully appreciate this task.