1SYSCTL(8)                                                            SYSCTL(8)
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NAME

6       sysctl - configure kernel parameters at runtime
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SYNOPSIS

9       sysctl [-n] [-e] variable ...
10       sysctl [-n] [-e] [-q] -w variable=value ...
11       sysctl [-n] [-e] [-q] -p <filename>
12       sysctl [-n] [-e] -a
13       sysctl [-n] [-e] -A
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DESCRIPTION

16       sysctl  is used to modify kernel parameters at runtime.  The parameters
17       available are those listed under /proc/sys/.  Procfs  is  required  for
18       sysctl(8)  support  in  Linux.   You can use sysctl(8) to both read and
19       write sysctl data.
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PARAMETERS

22       variable
23              The name of a key to read from.  An  example  is  kernel.ostype.
24              The '/' separator is also accepted in place of a '.'.
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26       variable=value
27              To set a key, use the form variable=value, where variable is the
28              key and value is the value to set it to.  If the value  contains
29              quotes or characters which are parsed by the shell, you may need
30              to enclose the value in double quotes.   This  requires  the  -w
31              parameter to use.
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33       -n     Use  this option to disable printing of the key name when print‐
34              ing values.
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36       -e     Use this option to ignore errors about unknown keys.
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38       -N     Use this option to only print the names. It may be  useful  with
39              shells that have programmable completion.
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41       -q     Use this option to not display the values set to stdout.
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43       -w     Use this option when you want to change a sysctl setting.
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45       -p     Load   in   sysctl   settings   from   the   file  specified  or
46              /etc/sysctl.conf if none given.  Specifying - as filename  means
47              reading data from standard input.
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49       -a     Display all values currently available.
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51       -A     Display all values currently available in table form.
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EXAMPLES

54       /sbin/sysctl -a
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56       /sbin/sysctl -n kernel.hostname
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58       /sbin/sysctl -w kernel.domainname="example.com"
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60       /sbin/sysctl -p /etc/sysctl.conf
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FILES

63       /proc/sys /etc/sysctl.conf
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SEE ALSO

66       sysctl.conf(5)
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BUGS

69       The -A parameter behaves just as -a does.
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AUTHOR

72       George Staikos, <staikos@0wned.org>
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77                                  21 Sep 1999                        SYSCTL(8)
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