SYSTEMD-SYSCTL.SERVICE(8)

SYSTEMD-SYSCTL.SERVICE(8)   systemd-sysctl.service   SYSTEMD-SYSCTL.SERVICE(8)

NAME
       systemd-sysctl.service, systemd-sysctl - Configure kernel parameters at
       boot

SYNOPSIS
       /lib/systemd/systemd-sysctl [OPTIONS...] [CONFIGFILE...]

       systemd-sysctl.service

DESCRIPTION
       systemd-sysctl.service is an early boot service that configures
       sysctl(8) kernel parameters by invoking /lib/systemd/systemd-sysctl.

       When invoked with no arguments, /lib/systemd/systemd-sysctl applies all
       directives from configuration files listed in sysctl.d(5). If one or
       more filenames are passed on the command line, only the directives in
       these files are applied.

       In addition, --prefix= option may be used to limit which sysctl
       settings are applied.

       See sysctl.d(5) for information about the configuration of sysctl
       settings. After sysctl configuration is changed on disk, it must be
       written to the files in /proc/sys before it takes effect. It is
       possible to update specific settings, or simply to reload all
       configuration, see Examples below.

OPTIONS
       --prefix=
           Only apply rules with the specified prefix.

       --cat-config
           Copy the contents of config files to standard output. Before each
           file, the filename is printed as a comment.

       --no-pager
           Do not pipe output into a pager.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

EXAMPLES
       Example 1. Reset all sysctl settings

           systemctl restart systemd-sysctl

       Example 2. View coredump handler configuration

           # sysctl kernel.core_pattern
           kernel.core_pattern = |/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I

       Example 3. Update coredump handler configuration

           # /lib/systemd/systemd-sysctl --prefix kernel.core_pattern

       This searches all the directories listed in sysctl.d(5) for
       configuration files and writes /proc/sys/kernel/core_pattern.

       Example 4. Update coredump handler configuration according to a
       specific file

           # /lib/systemd/systemd-sysctl 50-coredump.conf

       This applies all the settings found in 50-coredump.conf. Either
       /etc/sysctl.d/50-coredump.conf, or /run/sysctl.d/50-coredump.conf, or
       /usr/lib/sysctl.d/50-coredump.conf will be used, in the order of
       preference.

       See sysctl(8) for various ways to directly apply sysctl settings.

SEE ALSO
       systemd(1), sysctl.d(5), sysctl(8),

systemd 245                                          SYSTEMD-SYSCTL.SERVICE(8)