Sysctl: Unterschied zwischen den Versionen

Aktuelle Version vom 1. August 2025, 16:27 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

linux-sysctl-defaults

Dokumentation

Man-Page

sysctl.conf(5)
regex(7)

Links

Projekt

https://github.com/klaver/sysctl

Weblinks

@@ Zeile 75: / Zeile 75: @@
 == Anwendung ==
-<syntaxhighlight lang="bash" highlight="1-8" line>
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
 /sbin/sysctl -a
 </syntaxhighlight>
-<syntaxhighlight lang="bash" highlight="1-8" line>
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
 /sbin/sysctl -n kernel.hostname
 </syntaxhighlight>
-<syntaxhighlight lang="bash" highlight="1-8" line>
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
 /sbin/sysctl -w kernel.domainname="example.com"
 </syntaxhighlight>
-<syntaxhighlight lang="bash" highlight="1-8" line>
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
 /sbin/sysctl -p/etc/sysctl.conf
 </syntaxhighlight>
-<syntaxhighlight lang="bash" highlight="1-8" line>
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
 /sbin/sysctl -a --pattern forward
 </syntaxhighlight>
-<syntaxhighlight lang="bash" highlight="1-8" line>
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
 /sbin/sysctl -a --pattern forward$
 </syntaxhighlight>
-<syntaxhighlight lang="bash" highlight="1-8" line>
+<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>
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
 /sbin/sysctl --system --pattern '^net.ipv6'
 </syntaxhighlight>
@@ Zeile 154: / Zeile 154: @@
 == Anhang ==
 === Siehe auch ===
-{{Special:PrefixIndex/{{BASEPAGENAME}}}}
+{{Special:PrefixIndex/{{BASEPAGENAME}}/}}
 * [[linux-sysctl-defaults]]
-==== Dokumentation ====
+=== Dokumentation ===
 ; Man-Page
@@ Zeile 163: / Zeile 163: @@
 * [[regex]](7)
-==== Links ====
+=== Links ===
-===== Projekt =====
+==== Projekt ====
 # https://github.com/klaver/sysctl
-===== Weblinks =====
+==== Weblinks ====
 {{DEFAULTSORT:sysctl}}
@@ Zeile 173: / Zeile 173: @@
 [[Kategorie:Linux/Befehl]]
-[[Kategorie:Linux/Kernel]]
+[[Kategorie:Sysctl]]
-[[Kategorie:Linux/Sicherheit]]
+[[Kategorie:Linux/Prozess/Befehl]]
-[[Kategorie:Procps]]
-[[Kategorie:Linux/Prozess]]
 </noinclude>