procps 010114

sysctl.8

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+.\" Copyright 1999, George Staikos (staikos@0wned.org)
+.\" This file may be used subject to the terms and conditions of the
+.\" GNU General Public License Version 2, or any later version
+.\" at your option, as published by the Free Software Foundation.
+.\" This program is distributed in the hope that it will be useful,
+.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+.\" GNU General Public License for more details."
+.TH SYSCTL 8 "21 Sep 1999" "" ""
+.SH NAME
+sysctl \- configure kernel parameters at runtime
+.SH SYNOPSIS
+.B "sysctl [-n] variable ..."
+.br
+.B "sysctl [-n] -w variable=value ..."
+.br
+.B "sysctl [-n] -p <filename>    (default /etc/sysctl.conf)"
+.br
+.B "sysctl [-n] -a"
+.br
+.B "sysctl [-n] -A"
+.SH DESCRIPTION
+.B sysctl
+is used to modify kernel parameters at runtime.  The parameters available
+are those listed under /proc/sys/.  Procfs is required for 
+.B sysctl(8)
+support in Linux.  You can use
+.B sysctl(8)
+to both read and write sysctl data.
+.SH PARAMETERS
+.TP
+.B "variable"
+The name of a key to read from.  An example is kernel.ostype.  The '/'
+separator is also accepted in place of a '.'.
+.TP
+.B "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.
+.TP
+.B "-n"
+Use this option to disable printing of the key name when printing values.
+.TP
+.B "-w"
+Use this option when you want to change a sysctl setting.
+.TP
+.B "-p"
+Load in sysctl settings from the file specified or /etc/sysctl.conf if none given.
+.TP
+.B "-a"
+Display all values currently available.
+.TP
+.B "-A"
+Display all values currently available in table form.
+.SH EXAMPLES
+.TP
+/sbin/sysctl -a
+.TP
+/sbin/sysctl -n kernel.hostname
+.TP
+/sbin/sysctl -w kernel.domainname="example.com"
+.TP
+/sbin/sysctl -p /etc/sysctl.conf 
+.SH FILES
+.I /proc/sys
+.I /etc/sysctl.conf
+.SH SEE ALSO
+.BR sysctl.conf (5)
+.SH BUGS
+The -A parameter behaves just as -a does.
+.SH AUTHOR
+George Staikos, <staikos@0wned.org>
+