Manual: uptime

UPTIME(1)						User Commands						   UPTIME(1)

NAME
       uptime - Tell how long the system has been running.

SYNOPSIS
       uptime [options]

DESCRIPTION
       uptime  gives  a	 one line display of the following information.	 The current time, how long the system has been run‐
       ning, how many users are currently logged on, and the system load averages for the past 1, 5, and 15 minutes.

       This is the same information contained in the header line displayed by w(1).

       System load averages is the average number of processes that are either in a runnable or	 uninterruptable  state.   A
       process in a runnable state is either using the CPU or waiting to use the CPU.  A process in uninterruptable state is
       waiting	for some I/O access, eg waiting for disk.  The averages are taken over the three time intervals.  Load aver‐
       ages are not normalized for the number of CPUs in a system, so a load average of 1  means  a  single  CPU  system  is
       loaded all the time while on a 4 CPU system it means it was idle 75% of the time.

OPTIONS
       -p, --pretty
	      show uptime in pretty format

       -h, --help
	      display this help text

       -s, --since
	      system up since, in yyyy-mm-dd HH:MM:SS format

       -V, --version
	      display version information and exit

FILES
       /var/run/utmp
	      information about who is currently logged on

       /proc  process information

AUTHORS
       uptime was written by Larry Greenfield and Michael K. Johnson

SEE ALSO
       ps(1), top(1), utmp(5), w(1)

REPORTING BUGS
       Please send bug reports to procps@freelists.org

procps-ng						December 2012						   UPTIME(1)