1SYSTEMD-SYSCTL.SERVICE(8)   systemd-sysctl.service   SYSTEMD-SYSCTL.SERVICE(8)
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NAME

6       systemd-sysctl.service, systemd-sysctl - Configure kernel parameters at
7       boot
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SYNOPSIS

10       /usr/lib/systemd/systemd-sysctl [OPTIONS...] [CONFIGFILE...]
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12       systemd-sysctl.service
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DESCRIPTION

15       systemd-sysctl.service is an early boot service that configures
16       sysctl(8) kernel parameters by invoking
17       /usr/lib/systemd/systemd-sysctl.
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19       When invoked with no arguments, /usr/lib/systemd/systemd-sysctl applies
20       all directives from configuration files listed in sysctl.d(5). If one
21       or more filenames are passed on the command line, only the directives
22       in these files are applied.
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24       In addition, --prefix= option may be used to limit which sysctl
25       settings are applied.
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27       See sysctl.d(5) for information about the configuration of sysctl
28       settings. After sysctl configuration is changed on disk, it must be
29       written to the files in /proc/sys before it takes effect. It is
30       possible to update specific settings, or simply to reload all
31       configuration, see Examples below.
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OPTIONS

34       --prefix=
35           Only apply rules with the specified prefix.
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37       --cat-config
38           Copy the contents of config files to standard output. Before each
39           file, the filename is printed as a comment.
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41       --no-pager
42           Do not pipe output into a pager.
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44       -h, --help
45           Print a short help text and exit.
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47       --version
48           Print a short version string and exit.
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EXAMPLES

51       Example 1. Reset all sysctl settings
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53           systemctl restart systemd-sysctl
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55       Example 2. View coredump handler configuration
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57           # sysctl kernel.core_pattern
58           kernel.core_pattern = |/usr/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I
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60       Example 3. Update coredump handler configuration
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62           # /usr/lib/systemd/systemd-sysctl --prefix kernel.core_pattern
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64       This searches all the directories listed in sysctl.d(5) for
65       configuration files and writes /proc/sys/kernel/core_pattern.
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67       Example 4. Update coredump handler configuration according to a
68       specific file
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70           # /usr/lib/systemd/systemd-sysctl 50-coredump.conf
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72       This applies all the settings found in 50-coredump.conf. Either
73       /etc/sysctl.d/50-coredump.conf, or /run/sysctl.d/50-coredump.conf, or
74       /usr/lib/sysctl.d/50-coredump.conf will be used, in the order of
75       preference.
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77       See sysctl(8) for various ways to directly apply sysctl settings.
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SEE ALSO

80       systemd(1), sysctl.d(5), sysctl(8),
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84systemd 241                                          SYSTEMD-SYSCTL.SERVICE(8)
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