89 lines
2.2 KiB
Groff
89 lines
2.2 KiB
Groff
.\" Copyright 1999, George Staikos (staikos@0wned.org)
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.\" This file may be used subject to the terms and conditions of the
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.\" GNU General Public License Version 2, or any later version
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.\" at your option, as published by the Free Software Foundation.
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.\" This program is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU General Public License for more details."
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.TH SYSCTL.CONF "5" "2021-09-15" "procps-ng" "File Formats"
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.SH NAME
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sysctl.conf \- sysctl preload/configuration file
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.SH DESCRIPTION
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.B sysctl.conf
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is a simple file containing sysctl values to be read in and set by
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.BR sysctl .
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The syntax is simply as follows:
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.RS
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.sp
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.nf
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.ne 7
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# comment
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; comment
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token = value
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.fi
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.RE
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.PP
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Note that blank lines are ignored, and whitespace before and after a token or
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value is ignored, although a value can contain whitespace within. Lines which
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begin with a \fI#\fR or \fI;\fR are considered comments and ignored.
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If a line begins with a single \-, any attempts to set the value that fail will be
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ignored.
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.SH NOTES
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As the
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.BR /etc/sysctl.conf
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file is used to override default kernel parameter values, only a small number of parameters is predefined in the file.
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Use
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.IR /sbin/sysctl\ \-a
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or follow
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.BR sysctl (8)
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to list all possible parameters. The description of individual parameters can be found in the kernel documentation.
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Maximum supported line length of the value is 4096 characters due
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to a limitation of \fI/proc\fR entries in Linux kernel.
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.SH EXAMPLE
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.RS
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.sp
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.nf
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.ne 7
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# sysctl.conf sample
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#
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kernel.domainname = example.com
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; this one has a space which will be written to the sysctl!
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kernel.modprobe = /sbin/mod probe
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.fi
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.RE
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.PP
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.SH FILES
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.I /etc/sysctl.d/*.conf
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.br
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.I /run/sysctl.d/*.conf
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.br
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.I /usr/local/lib/sysctl.d/*.conf
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.br
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.I /usr/lib/sysctl.d/*.conf
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.br
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.I /lib/sysctl.d/*.conf
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.br
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.I /etc/sysctl.conf
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The paths where
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.B sysctl
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preload files usually exist. See also
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.B sysctl
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option
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.IR \-\-system .
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.SH SEE ALSO
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.BR sysctl (8)
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.SH AUTHOR
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.UR staikos@0wned.org
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George Staikos
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.UE
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.SH "REPORTING BUGS"
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Please send bug reports to
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.UR procps@freelists.org
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.UE
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