Open Source Software

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.

   -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),



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