sysctl.conf(5) [osx man page]

SYSCTL.CONF(5)						      BSD File Formats Manual						    SYSCTL.CONF(5)

NAME

     sysctl.conf -- kernel state defaults

DESCRIPTION

     The /etc/sysctl.conf file is read in when the system goes into multi-user mode to set default settings for the kernel.  The /etc/sysctl.conf
     is in the format of the sysctl(8) command, i.e.

	   sysctl_mib=value

     Comments are denoted by a ``#'' at the beginning of a line.

FILES

     /etc/sysctl.conf  Initial settings for sysctl(8).

EXAMPLES

     To disable coredumps, you may use a configuration like:

	   # Disable coredumps.
	   kern.coredump=0

SEE ALSO

     sysctl(8)

HISTORY

     The sysctl.conf file appeared in FreeBSD 4.0.

BUGS

     If loadable kernel modules are used to introduce additional kernel functionality and sysctls to manage that functionality, sysctl.conf may be
     processed too early in the boot process to set those sysctls.

BSD
								  August 3, 2007							       BSD

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.

       -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 237                                                                                                              SYSTEMD-SYSCTL.SERVICE(8)