The who command lists the users logged on to the system now. Here's an example of the output on my system:
%who
naylor ttyZ1 Nov 6 08:25 hal ttyp0 Oct 20 16:04 (zebra.ora.com:0.) pmui ttyp1 Nov 4 17:21 (dud.ora.com:0.0) jpeek ttyp2 Nov 5 23:08 (jpeek.com) hal ttyp3 Oct 28 15:43 (zebra.ora.com:0.) ...
Each line shows a different terminal or window. The columns show the username logged on, the tty ( 3.8 ) number, the login time, and, if the user is coming in via a network ( 1.33 ) , you'll see (in parentheses) their location. The user hal is logged on twice, for instance.
It's handy to search the output of who with grep ( 27.1 ) - especially on systems with a lot of users. For example:
-v |
% |
---|
who
|
The GNU who , on the CD-ROM, has more features than some other versions. |
---|
-