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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 1: / Zeile 1: @@
-'''sysctl''' configure kernel parameters at runtime
+'''sysctl''' - Kernel-Parameter zur Laufzeit konfigurieren
-= DESCRIPTION =
+== Beschreibung ==
-* sysctl  is  used  to modify kernel parameters at runtime.
+* ''sysctl'' kann sysctl-[[#Dateien|Dateien]] lesen und schreiben
-* The parameters available are those listed under /proc/sys/.
+* [[Procfs]] erforderlich
-* Procfs is required for sysctl support in Linux.  You can use sysctl to both read and write sysctl data.
-= SYNOPSIS =
+== Installation ==
- sysctl [options] [variable[=value]] [...]
+''sysctl'' ist Teil des Pakets [[procps]]
- sysctl -p [file or regexp] [...]
-= PARAMETERS =
+== Aufruf ==
-variable
+<syntaxhighlight lang="bash" highlight="1-2">
- The name of a key to read from.  An example is kernel.ostype.  The '/' separator is also accepted in place of a '.'.
+sysctl [options] [variable[=value]] [...]
+</syntaxhighlight>
-variable=value
+<syntaxhighlight lang="bash" highlight="1-2">
- To set a key, use the form variable=value where variable is the key and value is the value to set it  to.   If  the  value
+sysctl -p [file or regexp] [...]
- contains  quotes  or  characters  which are parsed by the shell, you may need to enclose the value in double quotes.  This
+</syntaxhighlight>
- requires the -w parameter to use.
--n, --values
+=== Optionen ===
- Use this option to disable printing of the key name when printing values.
+{| 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
+|}
--e, --ignore
+=== Umgebungsvariablen ===
- Use this option to ignore errors about unknown keys.
+=== Exit-Status ===
--N, --names
+== Anwendung ==
- Use this option to only print the names.  It may be useful with shells that have programmable completion.
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
+/sbin/sysctl -a
+</syntaxhighlight>
--q, --quiet
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
- Use this option to not display the values set to stdout.
+/sbin/sysctl -n kernel.hostname
+</syntaxhighlight>
--w, --write
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
- Use this option when you want to change a sysctl setting.
+/sbin/sysctl -w kernel.domainname="example.com"
+</syntaxhighlight>
--p[FILE], --load[=FILE]
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
- Load in sysctl settings from the file specified or /etc/sysctl.conf if none given.  Specifying - as filename means reading
+/sbin/sysctl -p/etc/sysctl.conf
- data from standard input.  Using this option will mean arguments to sysctl are files, which are read in the order they are
+</syntaxhighlight>
- specified.  The file argument may be specified as regular expression.
--a, --all
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
- Display all values currently available.
+/sbin/sysctl -a --pattern forward
+</syntaxhighlight>
---deprecated
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
- Include deprecated parameters to --all values listing.
+/sbin/sysctl -a --pattern forward$
+</syntaxhighlight>
--b, --binary
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
- Print value without new line.
+/sbin/sysctl -a --pattern 'net.ipv4.conf.(eth|wlan)0.arp'
+</syntaxhighlight>
---system
+<syntaxhighlight lang="bash" highlight="1-8" line copy>
- Load settings from all system configuration files.
+/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
@@ Zeile 57: / Zeile 122: @@
   /etc/sysctl.conf
--r, --pattern pattern
+== Konfiguration ==
- Only apply settings that match pattern.  The pattern uses extended regular expression syntax.
+=== Dateien ===
+{| class="wikitable options"
--A     Alias of -a
+|-
+! Datei !! Beschreibung
--d     Alias of -h
+|-
+| [[/proc/sys]] ||
--f     Alias of -p
+|-
+| [[/etc/sysctl.conf]] ||
--X     Alias of -a
+|}
--o     Does nothing, exists for BSD compatibility.
--x     Does nothing, exists for BSD compatibility.
+{| 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 ||
+|}
--h, --help
+<noinclude>
- Display help text and exit.
--V, --version
+== Anhang ==
- Display version information and exit.
+=== Siehe auch ===
+{{Special:PrefixIndex/{{BASEPAGENAME}}/}}
+* [[linux-sysctl-defaults]]
-EXAMPLES
+=== Dokumentation ===
- /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'
-DEPRECATED PARAMETERS
+; Man-Page
- The base_reachable_time and retrans_time are deprecated.  The sysctl command does not allow changing values of these  parameters.
+* [[sysctl.conf]](5)
- Users who insist to use deprecated kernel interfaces should push values to /proc file system by other means.  For example:
+* [[regex]](7)
- echo 256 > /proc/sys/net/ipv6/neigh/eth0/base_reachable_time
+=== Links ===
+==== Projekt ====
+# https://github.com/klaver/sysctl
-FILES
+==== Weblinks ====
- /proc/sys
- /etc/sysctl.conf
-SEE ALSO
+{{DEFAULTSORT:sysctl}}
- sysctl.conf(5) regex(7)
+{{DISPLAYTITLE:sysctl}}
-procps-ng
+[[Kategorie:Linux/Befehl]]
+[[Kategorie:Linux/Kernel]]
+[[Kategorie:Linux/Sicherheit]]
+[[Kategorie:Procps]]
+[[Kategorie:Linux/Prozess/Befehl]]
-[[Kategorie:Linux:Befehl]]
+</noinclude>
-[[Kategorie:Linux:Kernel]]
-[[Kategorie:Linux:Sicherheit]]