last(1) on Linux
The text 174260b540dc, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
show listing of last logged in users
Flags it lists
-
-F -
-R -
-a -
-d -
-f -
-i -
-n -
-num -
-o -
-t -
-w -
-x