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sysctl.conf(5) [centos man page]

SYSCTL.CONF(5)							   File Formats 						    SYSCTL.CONF(5)

NAME
sysctl.conf - sysctl preload/configuration file DESCRIPTION
sysctl.conf is a simple file containing sysctl values to be read in and set by sysctl. The syntax is simply as follows: # comment ; comment token = value Note that blank lines are ignored, and whitespace before and after a token or value is ignored, although a value can contain whitespace within. Lines which begin with a # or ; are considered comments and ignored. EXAMPLE
# sysctl.conf sample # kernel.domainname = example.com ; this one has a space which will be written to the sysctl! kernel.modprobe = /sbin/mod probe FILES
/run/sysctl.d/*.conf /etc/sysctl.d/*.conf /usr/local/lib/sysctl.d/*.conf /usr/lib/sysctl.d/*.conf /lib/sysctl.d/*.conf /etc/sysctl.conf The paths where sysctl preload files usually exit. See also sysctl option --system. SEE ALSO
sysctl(8) AUTHOR
George Staikos <staikos@0wned.org> REPORTING BUGS
Please send bug reports to <procps@freelists.org> procps-ng January 2012 SYSCTL.CONF(5)

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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 param- eter 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, <staikos@0wned.org> 21 Sep 1999 SYSCTL(8)

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