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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 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



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