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 running, 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  dis‐
       played 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 averages 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 ⟨greenfie@gauss.rutgers.
       edu⟩ and Michael K. Johnson ⟨johnsonm@sunsite.unc.edu⟩

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)