Difference between revisions of "Systemd"

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[[wikipedia:systemd|systemd]] is a Linux initialization system and service manager introduced in 2010 and adopted by default in [[RHEL 7.0]] (2014), that includes features like:
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[[wikipedia:systemd|systemd]] is a Linux initialization system and service manager introduced in [[2010]] and adopted by default in [[RHEL 7.0]] (2014), that includes features like:
 
* On-demand starting of daemons
 
* On-demand starting of daemons
* Inhibitor Locks which allows to block or delay system sleep and shutdown requests from the user <ref>https://www.freedesktop.org/wiki/Software/systemd/inhibit/</ref><ref>http://manpages.ubuntu.com/manpages/bionic/man1/systemd-inhibit.1.html</ref>
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* Inhibitor locks which allows to block or delay system [[sleep]] and [[shutdown]] requests from the user <ref>https://www.freedesktop.org/wiki/Software/systemd/inhibit/</ref><ref>http://manpages.ubuntu.com/manpages/bionic/man1/systemd-inhibit.1.html</ref>
* Mount and automount point maintenance (<code>[[systemd-mount]]</code><ref>https://www.freedesktop.org/software/systemd/man/systemd.mount.html</ref>, <code>systemd-umount</code> )
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* Mount and automount point maintenance (<code>[[systemd-mount]]</code><ref>https://www.freedesktop.org/software/systemd/man/systemd.mount.html</ref>, <code>[[systemd-umount]]</code> )
 
* Snapshot support
 
* Snapshot support
 
* [[ps|Processes]] tracking using Linux control groups (<code>[[systemd-cgls]]</code><code>[[systemd-cgtop]]</code>)
 
* [[ps|Processes]] tracking using Linux control groups (<code>[[systemd-cgls]]</code><code>[[systemd-cgtop]]</code>)
 
* Logging daemon, see <code>[[journalctl]]</code> and <code>[[systemd-cat]]</code>
 
* Logging daemon, see <code>[[journalctl]]</code> and <code>[[systemd-cat]]</code>
* [[resource management]]
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* [[Resource management]]
  
Config files:
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== Configuration files ==
* <code>/etc/systemd/[[logind.conf]]</code>
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* <code>[[/etc/]]systemd/[[logind.conf]]</code>
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* <code>[[/etc/]]systemd/[[system.conf]]</code>
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* <code>[[/etc/systemd/resolved.conf]]</code>
  
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* <code>[[/etc/systemd/system/]]</code>
  
  
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* [[systemd-logind]]: <code>[[loginctl]]</code>
 
* [[systemd-logind]]: <code>[[loginctl]]</code>
 
* [[systemd-networkd]]: <code>[[networkctl]]</code>, [[netplan]]
 
* [[systemd-networkd]]: <code>[[networkctl]]</code>, [[netplan]]
* systemd-timesyncd
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* [[systemd-timesyncd]]
 
* systemd-resolved: [[systemd-resolve]], <code>[[hostnamectl]]</code>
 
* systemd-resolved: [[systemd-resolve]], <code>[[hostnamectl]]</code>
 
* systemd-udevd
 
* systemd-udevd
 
* [[systemd-nspawn]]
 
* [[systemd-nspawn]]
  
<code>/lib/systemd/systemd-fsck</code>
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<code>[[/lib/systemd/]]systemd-fsck</code>
  
  
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<code>[[/lib/systemd/system/]]</code>
  
 
== Activities ==
 
== Activities ==
 
* Read systemd for Administrators: http://0pointer.de/blog/projects/resources.html
 
* Read systemd for Administrators: http://0pointer.de/blog/projects/resources.html
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* Read [[systemd v228]] local root exploit https://lwn.net/Articles/712367/
  
 
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== Related ==
== Related commands ==
 
 
* <code>systemd-tmpfiles --create</code>
 
* <code>systemd-tmpfiles --create</code>
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* [[OpenRC]]
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* [[machinectl]]
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* [[hostnamectl]]
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* systemd 250
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* [[systemd socket activation]] ([[Ubuntu 22.10]])
  
 
== See also ==
 
== See also ==
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* {{cron}}
 
* {{cron}}
 
* [[elogind]]
 
* [[elogind]]
* [[/run/]]
 
 
* {{init}}
 
* {{init}}
  
 
[[Category:Linux]]
 
[[Category:Linux]]
 
[[Category:systemd]]
 
[[Category:systemd]]

Latest revision as of 15:49, 2 April 2023

systemd is a Linux initialization system and service manager introduced in 2010 and adopted by default in RHEL 7.0 (2014), that includes features like:

Configuration files[edit]


Systemd components of daemons and binaries[4]:

/lib/systemd/systemd-fsck


/lib/systemd/system/

Activities[edit]

Related[edit]

See also[edit]

  • https://www.freedesktop.org/wiki/Software/systemd/inhibit/
  • http://manpages.ubuntu.com/manpages/bionic/man1/systemd-inhibit.1.html
  • https://www.freedesktop.org/software/systemd/man/systemd.mount.html
  • https://wiki.ubuntu.com/DebuggingSystemd
  • https://wiki.ubuntu.com/DebuggingSystemd
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