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 cur-
rent time, how long the system has been running, how many users are cur-
rently 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 unin-
terruptable 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 sys-
tem 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 ]8;;greenfie@gauss.rutgers.edu\Larry Greenfield]8;;\ and ]8;;johnsonm@sunsite.unc.edu\Michael K. Johnson]8;;\
SEE ALSO
ps(1), top(1), utmp(5), w(1)
REPORTING BUGS
Please send bug reports to ]8;;procps@freelists.org\procps@freelists.org]8;;\
procps-ng December 2012 UPTIME(1)
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