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.
-aInclude users even if they've been idle for more than one hour. Normally such users are not counted.
-lSort by load average.
-rReverse the sort order.
-tSort by up time.
-uSort by number of users.