1SYSCTL.CONF(5)                   File Formats                   SYSCTL.CONF(5)
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NAME

6       sysctl.conf - sysctl preload/configuration file
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DESCRIPTION

9       sysctl.conf is a simple file containing sysctl values to be read in and
10       set by sysctl.  The syntax is simply as follows:
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12              # comment
13              ; comment
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15              token = value
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17       Note that blank lines are ignored, and whitespace before  and  after  a
18       token  or  value  is  ignored,  although a value can contain whitespace
19       within.  Lines which begin with a # or ; are  considered  comments  and
20       ignored.
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22       If  a  line  begins with a single -, any attempts to set the value that
23       fail will be ignored.
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NOTES

27       As the /etc/sysctl.conf file is used to override default kernel parame‐
28       ter  values,  only  a  small  number of parameters is predefined in the
29       file.  Use /sbin/sysctl -a or follow sysctl(8) to list all possible pa‐
30       rameters.  The description of individual parameters can be found in the
31       kernel documentation.
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33       Maximum supported line length of the value is 4096 characters due to  a
34       limitation of /proc entries in Linux kernel.
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EXAMPLE

37              # sysctl.conf sample
38              #
39                kernel.domainname = example.com
40              ; this one has a space which will be written to the sysctl!
41                kernel.modprobe = /sbin/mod probe
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FILES

44       /etc/sysctl.d/*.conf
45       /run/sysctl.d/*.conf
46       /usr/local/lib/sysctl.d/*.conf
47       /usr/lib/sysctl.d/*.conf
48       /lib/sysctl.d/*.conf
49       /etc/sysctl.conf
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51       The  paths  where  sysctl preload files usually exist.  See also sysctl
52       option --system.
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SEE ALSO

55       sysctl(8)
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AUTHOR

58       George Staikos ⟨staikos@0wned.org⟩
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REPORTING BUGS

61       Please send bug reports to ⟨procps@freelists.org⟩
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65procps-ng                         2021-09-15                    SYSCTL.CONF(5)
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