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uptime(1) — Linux manual page

UPTIME(1)                General Commands Manual                UPTIME(1)

NAME         top

       uptime - Tell how long the system has been running.

SYNOPSIS         top

       uptime [option ...]

DESCRIPTION         top

       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         top

       -c, --container
              show the container uptime instead of system uptime.

       -p, --pretty
              show uptime in pretty format

       -h, --help
              display this help text

       -r, --raw
              Display values in a raw format. Current time and uptime are
              displayed in seconds.

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

       -V, --version
              display version information and exit

ENVIRONMENT         top

       PROCPS_CONTAINER
              If $PROCPS_CONTAINER is set, then uptime behaves as if the
              --container option has been given.

FILES         top

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

       /proc  process information

SEE ALSO         top

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

REPORTING BUGS         top

       Please send bug reports to ⟨[email protected]⟩.

COLOPHON         top

       This page is part of the procps-ng (/proc filesystem utilities)
       project.  Information about the project can be found at 
       ⟨https://gitlab.com/procps-ng/procps⟩.  If you have a bug report
       for this manual page, see
       ⟨https://gitlab.com/procps-ng/procps/blob/master/Documentation/bugs.md⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://gitlab.com/procps-ng/procps.git⟩ on 2025-08-11.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2025-07-30.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there is
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       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       [email protected]

procps-ng                       2024-02-08                      UPTIME(1)

Pages that refer to this page: htop(1),  pcp-uptime(1),  tload(1),  top(1),  w(1),  getloadavg(3),  proc(5),  proc_loadavg(5),  time_namespaces(7)

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