UPTIME(1-SysV) RISC/os Reference Manual UPTIME(1-SysV)
NAME
uptime - display system up time and load statistics
SYNOPSIS
uptime [ -l ] [ -s ] [ -n ] [ -f format ]
DESCRIPTION
The uptime command displays statistics on how long the sys-
tem has been up, how many users are on the system, and three
types of load averages: standard (exponentially decaying
for 1, 5, and 15 minutes), extended (exponentially decaying
for 1, 5, and 20 seconds plus the standard load average),
and rolling average (for 1, 5, and 15 minutes).
The default format of output looks similar to the BSD UNIX
command of the same name. The following shows how this
might look:
10:33am up 16:50, 17 users, load average: 1.03, 0.50, 0.00
Command-line options provide similar formats using the vari-
ous types of available load averages. In addition, the for-
mat can be defined by the user by using the -f option or the
UPTIME_FORMAT environment variable.
The format string can contain any text. The sequences \n,
\t, \f, \r, \b, and \\ are handled just like C escapes. All
other escaped characters are printed as-is. Statistics are
printed by using %-specifiers, as in the date(1) command.
The available sequences are:
t Current time as HH:MM on a 12 hour clock
T Current time as HH:MM on a 24 hour clock
r ``am'' or ``pm''
R ``AM'' or ``PM''
u Number of users with idle time less than an hour
U Number of users on the system
d Number of days the system has been up
h Number of hours the system has been up not includ-
ing days
H Number of hours the system has been up including
days
m Number of minutes the system has been up not
including days and hours
M Number of minutes the system has been up including
days and hours
D Date sentence (hh:mm or d day(s), hh:mm)
p Plurality -- `s' if last %-specifier used was not
exactly 1
a Exponentially decaying load average as: x.xx,
x.xx, x.xx
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UPTIME(1-SysV) RISC/os Reference Manual UPTIME(1-SysV)
A Extended load average as: x.xx, x.xx, x.xx, x.xx,
x.xx, x.xx
1a Exponentially decaying load average over last 1
second
2a Exponentially decaying load average over last 5
seconds
3a Exponentially decaying load average over last 20
seconds
4a Exponentially decaying load average over last 60
seconds
5a Exponentially decaying load average over last 300
seconds
6a Exponentially decaying load average over last 900
seconds
s Rolling average as: x.xx, x.xx, x.xx
1s Rolling average over last 60 seconds
2s Rolling average over last 300 seconds
3s Rolling average over last 900 seconds
% The character %
The specifiers %[456]s are interpreted as %s. The sequences
%[1-6][^as] cause nothing to be printed.
The default format is given by the following string:
%t%r up %D, %U user%p, load average: %a
Any format option (-l, -s, -n, or -f,) given overrides the
UPTIME_FORMAT variable.
OPTIONS
-l Use the standard format, but display all exponen-
tially decaying load averages (%A) instead of just
the oldest 3 (%a).
-s Use the standard format, but display rolling aver-
age (%s) instead of exponentially decaying aver-
ages (%a).
-n Use the default format (see above). This should
be used in all shell script applications that need
to use the default format, since it overrides the
UPTIME_FORMAT environment variable.
-f format Use the format given by format to print the
statistics. The format string should be quoted in
the shell to avoid interpretation by the shell.
FILES
/unix Operating system executable
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UPTIME(1-SysV) RISC/os Reference Manual UPTIME(1-SysV)
/dev/kmem Operating system memory image
SEE ALSO
ruptime(1C).
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