Tech Tip!
When it comes to shutting down UNIX systems gracefully but without warning, it is nice to know which of the logged-in users have been inactive and for how long. All flavors of UNIX come with the 'who' command, most of which can tell you how long someone has been idle or inactive. The -u option typically reveals the inactivity timer, and the -H option displays an appropriate header for the display, as demonstrated below.
AIX (Activity is a misnomer - it is the idle or Inactivity time)
>who -uH
Name
Line &
nbsp; Time
Activity PID
Hostname
root
pts/2 Jul 28
20:10 18:10 20202
(:0.0)
userx
pts/3 Aug 01
05:12 0:05
3544 (100.0.13.52)
Solaris
# who -uH
NAME
LINE
TIME
IDLE PID COMMENTS
userx
pts/17 Aug 1
06:31 0:04
8844 (192.168.150.209)
usery
pts/28 Aug 1
06:31 2:02
8847 (192.168.150.197)
RedHat Linux
#who -uH
NAME
LINE
TIME
IDLE PID
COMMENT
userx
pts/0 Aug 1 11:12
0:02 23493
(169.248.229.217)
Tech Tip found on Ashwood Computers website.