SYSCTL(8)                                                                                                              SYSCTL(8)



NAME
       sysctl - configure kernel parameters at runtime

SYNOPSIS
       sysctl [-n] [-e] variable ...
       sysctl [-n] [-e] [-q] -w variable=value ...
       sysctl [-n] [-e] [-q] -p <filename>
       sysctl [-n] [-e] -a
       sysctl [-n] [-e] -A

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

PARAMETERS
       variable
              The name of a key to read from.  An example is kernel.ostype.  The '/' separator is also accepted in  place  of  a
              '.'.

       variable=value
              To  set a key, use the form variable=value, where variable is the key and value is the value to set it to.  If the
              value contains quotes or characters which are parsed by the shell, you may need to enclose  the  value  in  double
              quotes.  This requires the -w parameter to use.

       -n     Use this option to disable printing of the key name when printing values.

       -e     Use this option to ignore errors about unknown keys.

       -N     Use this option to only print the names. It may be useful with shells that have programmable completion.

       -q     Use this option to not display the values set to stdout.

       -w     Use this option when you want to change a sysctl setting.

       -p     Load in sysctl settings from the file specified or /etc/sysctl.conf if none given.  Specifying - as filename means
              reading data from standard input.

       -a     Display all values currently available.

       -A     Display all values currently available in table form.

EXAMPLES
       /sbin/sysctl -a

       /sbin/sysctl -n kernel.hostname

       /sbin/sysctl -w kernel.domainname="example.com"

       /sbin/sysctl -p /etc/sysctl.conf

FILES
       /proc/sys /etc/sysctl.conf

SEE ALSO
       sysctl.conf(5)

BUGS
       The -A parameter behaves just as -a does.

AUTHOR
       George Staikos, <staikosAT0wned.org>




                                                           21 Sep 1999                                                 SYSCTL(8)