1UPTIME(1)                        User Commands                       UPTIME(1)
2
3
4

NAME

6       uptime - Tell how long the system has been running.
7

SYNOPSIS

9       uptime [options]
10

DESCRIPTION

12       uptime gives a one line display of the following information.  The cur‐
13       rent time, how long the system has been running,  how  many  users  are
14       currently  logged  on,  and the system load averages for the past 1, 5,
15       and 15 minutes.
16
17       This is the same information contained in the header line displayed  by
18       w(1).
19
20       System load averages is the average number of processes that are either
21       in a runnable or uninterruptable state.  A process in a runnable  state
22       is  either using the CPU or waiting to use the CPU.  A process in unin‐
23       terruptable state is waiting for some I/O access, eg waiting for  disk.
24       The  averages  are  taken over the three time intervals.  Load averages
25       are not normalized for the number of CPUs in a system, so a load  aver‐
26       age  of 1 means a single CPU system is loaded all the time while on a 4
27       CPU system it means it was idle 75% of the time.
28

OPTIONS

30       -p, --pretty
31              show uptime in pretty format
32
33       -h, --help
34              display this help text
35
36       -s, --since
37              system up since, in yyyy-mm-dd HH:MM:SS format
38
39       -V, --version
40              display version information and exit
41

FILES

43       /var/run/utmp
44              information about who is currently logged on
45
46       /proc  process information
47

AUTHORS

49       uptime was written by Larry Greenfield ⟨greenfie@gauss.rutgers.edu⟩ and
50       Michael K. Johnson ⟨johnsonm@sunsite.unc.edu⟩
51

SEE ALSO

53       ps(1), top(1), utmp(5), w(1)
54

REPORTING BUGS

56       Please send bug reports to ⟨procps@freelists.org⟩
57
58
59
60procps-ng                        December 2012                       UPTIME(1)
Impressum