New with 3.2.5: The oslevel command shows OS and component levels.
Run oslevel -help to see options

The command 'lslpp -h bos.obj' will show all lines referring to the BOS, 
Basic Operating System.  E.g.:

Fix Id  Release         Status    Action     Date       Time     User Name
------- --------------- --------- ---------- ---------- -------- ---------
Path: /usr/lib/objrepos
bos.obj
        03.02.0000.0000 COMPLETE  COMMIT     12/31/69   18:00:00 root
U401864 03.02.0000.0000 COMPLETE  COMMIT     11/12/92   20:09:35 root
U401968 03.02.0000.0000 COMPLETE  COMMIT     11/12/92   23:18:21 root
U401969 03.02.0000.0000 COMPLETE  COMMIT     11/12/92   23:18:20 root
                 ..........................
U418349 03.02.0000.0000 COMPLETE  COMMIT     08/28/93   15:34:13 root
U419950 03.02.0000.0000 COMPLETE  COMMIT     08/28/93   15:34:11 root

For AIX 3.2, you may come across discussions on 3.2.0, 3.2.1, 3.2.2,
3.2.3 extended, 3.2.4 and 3.2.5.  There is no absolute way to tell which
of these you are running since the newer releases are simply 3.2.0 with
some sets of PTFs added. See above example listing. These selective
fixes could mean there are literally thousands of slightly different
variations of 3.2 in use. Please see section 6 to request some useful
faxes to help with this number game.

AIX 3.2.4 and later attempts to resolve this confusion. The OS is
broken down into subsystems so that updates can be applied to an entire
subsystem.  lslpp also sports a new option; use 'lslpp -m bos.obj' to
show what level and update the system is running. You can also use the
new oslevel command. Unless you have a pressing need (such as
applications unsupported on > 3.2.3), it is recommended that you update
to this level. Also see 1.128.

Some parts © 2009 Advameg, Inc.