SYSCTL.CONF(5) File Formats SYSCTL.CONF(5)
sysctl.conf - sysctl preload/configuration file
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.
As the /etc/sysctl.conf file is used to override default kernel parameter values, only a small number of parameters is predefined in the file. Use /sbin/sysctl -a or follow sysctl(8) to list all possible parameters. The description of individual parameters can be found in the kernel documentation.
# sysctl.conf sample # kernel.domainname = example.com ; this one has a space which will be written to the sysctl! kernel.modprobe = /sbin/mod probe
/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.
George Staikos ⟨email@example.com⟩
Please send bug reports to ⟨firstname.lastname@example.org⟩
This page is part of the procps-ng (/proc filesystem utilities) project. Information about the project can be found at ⟨https://gitlab.com/procps-ng/procps⟩. If you have a bug report for this manual page, see ⟨https://gitlab.com/procps-ng/procps/blob/master/Documentation/bugs.md⟩. This page was obtained from the project's upstream Git repository ⟨https://gitlab.com/procps-ng/procps.git⟩ on 2020-12-18. (At that time, the date of the most recent commit that was found in the repository was 2020-10-24.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com procps-ng 2020-06-04 SYSCTL.CONF(5)
Pages that refer to this page: sysctl.d(5), sysctl(8)