NAME
systemd-sysctl.service, systemd-sysctl - Configure kernel parameters at bootSYNOPSIS
/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.
--strict=
Always return non-zero exit code on failure
(including invalid sysctl variable name and insufficient permissions), unless
the sysctl variable name is prefixed with a "-" character.
--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.
CREDENTIALS
systemd-sysctl supports the service credentials logic as implemented by LoadCredential=/SetCredential= (see systemd.exec(1) for details). The following credentials are used when passed in: "sysctl.extra"The contents of this credential may contain
additional lines to operate on. The credential contents should follow the same
format as any other sysctl.d/ drop-in configuration file. If this credential
is passed it is processed after all of the drop-in files read from the file
system. The settings configured in the credential hence take precedence over
those in the file system.
Note that by default the systemd-sysctl.service unit file is set up to inherit
the "sysctl.extra" credential from the service manager.
EXAMPLES
Example 1. Reset all sysctl settingssystemctl restart systemd-sysctl
# sysctl kernel.core_pattern kernel.core_pattern = |/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I
# /lib/systemd/systemd-sysctl --prefix kernel.core_pattern
# /lib/systemd/systemd-sysctl 50-coredump.conf
SEE ALSO
systemd(1), sysctl.d(5), sysctl(8)systemd 252 |