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 
       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 con-
	      tains  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 print-
	      ing 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.

       -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, 




				 21 Sep 1999			    SYSCTL(8)

UNIX/Linux commands referenced on this page:

1. at
2. write
3. which
4. disable
5. display
6. as