ruptime
[options]Show the status of local networked machines (similar to uptime).
This command is generally no longer used because the supporting daemon generates an inordinate amount of unnecessary network traffic.
-a
Include users even if they've been idle for more than one hour. Normally such users are not counted.
-l
Sort by load average.
-r
Reverse the sort order.
-t
Sort by up time.
-u
Sort by number of users.