UPTIME(E)              Linux User's Manual              UPTIME(E)



NAME
       uptime - Tell how long the system has been running.

SYNOPSIS
       uptime
       uptime [-V]

DESCRIPTION
       uptime  gives a one line display of the following informa-
       tion.  The current time, how long the system has been run-
       ning, how many users are currently logged on, and the sys-
       tem load averages for the past 1, 5, and 15 minutes.

       Load average is obtained by accessing /proc/loadavg over a
       given  amount of time. Thus, a load average of 1 indicates
       maximum processor performance on a single  processor  sys-
       tem.   Load  averages that are consistently high (that is,
       all three number reported by uptime  are  higher  than  1)
       indicate  an  overtaxed system. However, low load averages
       might not correspond exactly  with  quick  system  perfor-
       mance,  and high load average doesn't always indicate slow
       system performance.

       This is the same information contained in the header  line
       displayed by w(w) and by top(p).

FILES
       /var/run/utmp  information  about  who is currently logged
       on
       /proc     process information
       /proc/loadavg  load average information

AUTHORS
       uptime   was   written   by   Larry   Greenfield   <green-
       fie@gauss.rutgers.edu>   and  Michael  K.  Johnson  <john-
       sonm@sunsite.unc.edu>.

       Please send bug reports to <acahalan@cs.uml.edu>

SEE ALSO
       ps(s), top(p), utmp(p), w(w), getloadavg(g)



Cohesive Systems           26 Jan 1993                  UPTIME(E)