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 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 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⟩