SYSCTL(L)                                               SYSCTL(L)



NAME
       sysctl - configure kernel parameters at runtime

SYNOPSIS
       sysctl [-n] variable ...
       sysctl [-n] -w variable=value ...
       sysctl [-n] -p <filename>    (default /etc/sysctl.conf)
       sysctl [-n] -a
       sysctl [-n] -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(l) support in
       Linux.  You can use  sysctl(l)  to  both  read  and  write
       sysctl data.

PARAMETERS
       variable
              The name of a key to read from.  An example is ker-
              nel.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.

       -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.

       -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(f)

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

AUTHOR
       George Staikos, <staikos@0wned.org>




                           21 Sep 1999                  SYSCTL(L)