ok, I would add a couple commands to the above.
the df and du commands tell you how space in an already created filesystem you have left.
Well, what about the space I have left on the disk that is not allocated to a filesystem.
first, list your logical volumes:
#lsvg
next check for free physical partitions (pp's)
#lsvg -p roovg
or
#lsvg -p usercreatedVG
thses free pp's if you have any could be used to expand a full filesystem or to create a new filesystem.
hope that this helps
LarryBoy "I ... am... that ... Hero