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. If a line begins with a single -, any attempts to set the value that fail will be ignored. NOTES As the /etc/sysctl.conf file is used to override default kernel parame- ter values, only a small number of parameters is predefined in the file. Use /sbin/sysctl -a or follow sysctl(8) to list all possible pa- rameters. The description of individual parameters can be found in the kernel documentation. Maximum supported line length of the value is 4096 characters due to a limitation of /proc entries in Linux kernel. 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 /etc/sysctl.d/*.conf /run/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 exist. 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 2021-09-15 SYSCTL.CONF(5)
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