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sysctl
'''sysctl''' - Kernel-Parameter zur Laufzeit konfigurieren


Usage:
== Beschreibung ==
sysctl [options] [variable[=value] ...]
* ''sysctl'' kann sysctl-[[#Dateien|Dateien]] lesen und schreiben
* [[Procfs]] erforderlich


Options:
== Installation ==
  -a, --all            display all variables
''sysctl'' ist Teil des Pakets [[procps]]
  -A                  alias of -a
  -X                  alias of -a
      --deprecated    include deprecated parameters to listing
  -b, --binary        print value without new line
  -e, --ignore        ignore unknown variables errors
  -N, --names          print variable names without values
  -n, --values        print only values of a variables
  -p, --load[=<file>] read values from file
  -f                  alias of -p
      --system        read values from all system directories
  -r, --pattern <expression>
                      select setting that match expression
  -q, --quiet          do not echo variable set
  -w, --write          enable writing a value to variable
  -o                  does nothing
  -x                  does nothing
  -d                  alias of -h


-h, --help    display this help and exit
== Aufruf ==
-V, --version  output version information and exit
<syntaxhighlight lang="bash" highlight="1-2">
sysctl [options] [variable[=value]] [...]
</syntaxhighlight>


For more details see sysctl(8).
<syntaxhighlight lang="bash" highlight="1-2">
sysctl -p [file or regexp] [...]
</syntaxhighlight>
 
=== Optionen ===
{| class="wikitable sortable options gnu"
|-
! Unix !! GNU !! Parameter !! Beschreibung
|-
| -n || --values || || Do not display the key name when printing values
|-
| -e || --ignore || || Ignore errors about unknown keys
|-
| -N || --names || || Only display names (maybe useful for programmable completion)
|-
| -q || --quiet || || Do not display the values set to stdout
|-
| -w || --write || || Change sysctl settings
|-
| -p || --load || [=FILE] || Load in sysctl settings from the file specified or
* /etc/sysctl.conf if none given
* Specifying - as filename means reading data from standard input
* Using this option will mean arguments to sysctl are files, which are read in the order they are specified
* The file argument may be specified as regular expression
|-
| -a || --all || || Display all values currently available
|-
| || --deprecated || || Include deprecated parameters to --all values listing
|-
| -b || --binary || || Print value without new line
|-
| || --system || || Load settings from all system configuration files
* /run/sysctl.d/*.conf
* /etc/sysctl.d/*.conf
* /usr/local/lib/sysctl.d/*.conf
* /usr/lib/sysctl.d/*.conf
* /lib/sysctl.d/*.conf
* /etc/sysctl.conf
|-
| -r || --pattern pattern || || Only apply settings that match pattern. The pattern uses extended regular expression syntax
|-
| -A || || || Alias of -a
|-
| -d || || || Alias of -h
|-
| -f || || || Alias of -p
|-
| -X || || || Alias of -a
|-
| -o || || || Does nothing, exists for BSD compatibility
|-
| -x || || || Does nothing, exists for BSD compatibility
|-
| -h || --help || || Display help text and exit
|-
| -V || --version || || Display version information and exit
|}
 
=== Umgebungsvariablen ===
=== Exit-Status ===
 
== Anwendung ==
<syntaxhighlight lang="bash" highlight="1-8" line copy>
/sbin/sysctl -a
</syntaxhighlight>
 
<syntaxhighlight lang="bash" highlight="1-8" line copy>
/sbin/sysctl -n kernel.hostname
</syntaxhighlight>
 
<syntaxhighlight lang="bash" highlight="1-8" line copy>
/sbin/sysctl -w kernel.domainname="example.com"
</syntaxhighlight>
 
<syntaxhighlight lang="bash" highlight="1-8" line copy>
/sbin/sysctl -p/etc/sysctl.conf
</syntaxhighlight>
 
<syntaxhighlight lang="bash" highlight="1-8" line copy>
/sbin/sysctl -a --pattern forward
</syntaxhighlight>
 
<syntaxhighlight lang="bash" highlight="1-8" line copy>
/sbin/sysctl -a --pattern forward$
</syntaxhighlight>
 
<syntaxhighlight lang="bash" highlight="1-8" line copy>
/sbin/sysctl -a --pattern 'net.ipv4.conf.(eth|wlan)0.arp'
</syntaxhighlight>
 
<syntaxhighlight lang="bash" highlight="1-8" line copy>
/sbin/sysctl --system --pattern '^net.ipv6'
</syntaxhighlight>
 
; -p --load [=FILE]
Load in sysctl settings from the file specified or /etc/sysctl.conf if none given
* Specifying - as filename means reading data from standard input
* Using this option will mean arguments to sysctl are files, which are read in the order they are specified
* The file argument may be specified as regular expression
 
; --system
Load settings from all system configuration files
/run/sysctl.d/*.conf
/etc/sysctl.d/*.conf
/usr/local/lib/sysctl.d/*.conf
/usr/lib/sysctl.d/*.conf
/lib/sysctl.d/*.conf
/etc/sysctl.conf
 
== Konfiguration ==
=== Dateien ===
{| class="wikitable options"
|-
! Datei !! Beschreibung
|-
| [[/proc/sys]] ||
|-
| [[/etc/sysctl.conf]] ||
|}
 
{| class="wikitable options"
|-
! Datei !! Beschreibung
|-
| /run/sysctl.d/*.conf ||
|-
| /etc/sysctl.d/*.conf ||
|-
| /usr/local/lib/sysctl.d/*.conf ||
|-
| /usr/lib/sysctl.d/*.conf ||
|-
| /lib/sysctl.d/*.conf ||
|-
| /etc/sysctl.conf ||
|}
 
<noinclude>
 
== Anhang ==
=== Siehe auch ===
{{Special:PrefixIndex/{{BASEPAGENAME}}/}}
* [[linux-sysctl-defaults]]
 
=== Dokumentation ===
 
; Man-Page
* [[sysctl.conf]](5)
* [[regex]](7)
 
=== Links ===
==== Projekt ====
# https://github.com/klaver/sysctl
 
==== Weblinks ====
 
{{DEFAULTSORT:sysctl}}
{{DISPLAYTITLE:sysctl}}
 
[[Kategorie:Linux/Befehl]]
[[Kategorie:Linux/Kernel]]
[[Kategorie:Linux/Sicherheit]]
[[Kategorie:Procps]]
[[Kategorie:Linux/Prozess/Befehl]]
 
</noinclude>

Aktuelle Version vom 11. Mai 2025, 13:41 Uhr

sysctl - Kernel-Parameter zur Laufzeit konfigurieren

Beschreibung

  • sysctl kann sysctl-Dateien lesen und schreiben
  • Procfs erforderlich

Installation

sysctl ist Teil des Pakets procps

Aufruf

sysctl [options] [variable[=value]] [...]

sysctl -p [file or regexp] [...]

Optionen

Unix GNU Parameter Beschreibung
-n --values Do not display the key name when printing values
-e --ignore Ignore errors about unknown keys
-N --names Only display names (maybe useful for programmable completion)
-q --quiet Do not display the values set to stdout
-w --write Change sysctl settings
-p --load [=FILE] Load in sysctl settings from the file specified or
  • /etc/sysctl.conf if none given
  • Specifying - as filename means reading data from standard input
  • Using this option will mean arguments to sysctl are files, which are read in the order they are specified
  • The file argument may be specified as regular expression
-a --all Display all values currently available
--deprecated Include deprecated parameters to --all values listing
-b --binary Print value without new line
--system Load settings from all system configuration files
  • /run/sysctl.d/*.conf
  • /etc/sysctl.d/*.conf
  • /usr/local/lib/sysctl.d/*.conf
  • /usr/lib/sysctl.d/*.conf
  • /lib/sysctl.d/*.conf
  • /etc/sysctl.conf
-r --pattern pattern Only apply settings that match pattern. The pattern uses extended regular expression syntax
-A Alias of -a
-d Alias of -h
-f Alias of -p
-X Alias of -a
-o Does nothing, exists for BSD compatibility
-x Does nothing, exists for BSD compatibility
-h --help Display help text and exit
-V --version Display version information and exit

Umgebungsvariablen

Exit-Status

Anwendung

/sbin/sysctl -a

/sbin/sysctl -n kernel.hostname

/sbin/sysctl -w kernel.domainname="example.com"

/sbin/sysctl -p/etc/sysctl.conf

/sbin/sysctl -a --pattern forward

/sbin/sysctl -a --pattern forward$

/sbin/sysctl -a --pattern 'net.ipv4.conf.(eth|wlan)0.arp'

/sbin/sysctl --system --pattern '^net.ipv6'
-p --load [=FILE]

Load in sysctl settings from the file specified or /etc/sysctl.conf if none given

  • Specifying - as filename means reading data from standard input
  • Using this option will mean arguments to sysctl are files, which are read in the order they are specified
  • The file argument may be specified as regular expression
--system

Load settings from all system configuration files 

/run/sysctl.d/*.conf
/etc/sysctl.d/*.conf
/usr/local/lib/sysctl.d/*.conf
/usr/lib/sysctl.d/*.conf
/lib/sysctl.d/*.conf
/etc/sysctl.conf

Konfiguration

Dateien

Datei Beschreibung
/proc/sys
/etc/sysctl.conf
Datei Beschreibung
/run/sysctl.d/*.conf
/etc/sysctl.d/*.conf
/usr/local/lib/sysctl.d/*.conf
/usr/lib/sysctl.d/*.conf
/lib/sysctl.d/*.conf
/etc/sysctl.conf


Anhang

Siehe auch

Dokumentation

Man-Page

Links

Projekt

  1. https://github.com/klaver/sysctl

Weblinks


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