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⟩