Difference between revisions of "Systemd"
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↑ 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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| − | [[wikipedia:systemd|systemd]] is a Linux initialization system and service manager introduced in 2010 and adopted by default in [[ | + | [[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 | + | * 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> ) | + | * 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 | ||
| − | * [[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]] | ||
| − | + | == Configuration files == | |
| − | * <code>/etc/systemd/logind.conf</code> | + | * <code>[[/etc/]]systemd/[[logind.conf]]</code> |
| + | * <code>[[/etc/]]systemd/[[system.conf]]</code> | ||
| + | * <code>[[/etc/systemd/resolved.conf]]</code> | ||
| + | * <code>[[/etc/systemd/system/]]</code> | ||
| Line 15: | Line 19: | ||
* systemd: <code>[[systemctl]]</code> | * systemd: <code>[[systemctl]]</code> | ||
* systemd-journald: <code>[[journalctl]]</code> | * systemd-journald: <code>[[journalctl]]</code> | ||
| − | * [[systemd-logind]] | + | * [[systemd-logind]]: <code>[[loginctl]]</code> |
| − | * systemd-networkd: <code>[[networkctl]]</code>, [[netplan]] | + | * [[systemd-networkd]]: <code>[[networkctl]]</code>, [[netplan]] |
| − | * systemd-timesyncd | + | * [[systemd-timesyncd]] |
* systemd-resolved: [[systemd-resolve]], <code>[[hostnamectl]]</code> | * systemd-resolved: [[systemd-resolve]], <code>[[hostnamectl]]</code> | ||
* systemd-udevd | * systemd-udevd | ||
| + | * [[systemd-nspawn]] | ||
| − | <code>/lib/systemd/systemd-fsck</code> | + | <code>[[/lib/systemd/]]systemd-fsck</code> |
| + | |||
| + | |||
| + | <code>[[/lib/systemd/system/]]</code> | ||
| + | |||
| + | == Activities == | ||
| + | * Read systemd for Administrators: http://0pointer.de/blog/projects/resources.html | ||
| + | * Read [[systemd v228]] local root exploit https://lwn.net/Articles/712367/ | ||
| + | |||
| + | == Related == | ||
| + | * <code>systemd-tmpfiles --create</code> | ||
| + | * [[OpenRC]] | ||
| + | * [[machinectl]] | ||
| + | * [[hostnamectl]] | ||
| + | * systemd 250 | ||
| + | * [[systemd socket activation]] ([[Ubuntu 22.10]]) | ||
== See also == | == See also == | ||
| + | * {{systemd}} | ||
* {{macOS commands}} | * {{macOS commands}} | ||
| − | * | + | * {{Daemontools}} |
| − | * | + | * {{Service management}} |
| + | * {{cron}} | ||
* [[elogind]] | * [[elogind]] | ||
| + | * {{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:
- On-demand starting of daemons
- Inhibitor locks which allows to block or delay system sleep and shutdown requests from the user [1][2]
- Mount and automount point maintenance (
systemd-mount[3],systemd-umount) - Snapshot support
- Processes tracking using Linux control groups (
systemd-cglssystemd-cgtop) - Logging daemon, see
journalctlandsystemd-cat - Resource management
Configuration files[edit]
Systemd components of daemons and binaries[4]:
- systemd:
systemctl - systemd-journald:
journalctl - systemd-logind:
loginctl - systemd-networkd:
networkctl, netplan - systemd-timesyncd
- systemd-resolved: systemd-resolve,
hostnamectl - systemd-udevd
- systemd-nspawn
/lib/systemd/systemd-fsck
Activities[edit]
- Read systemd for Administrators: http://0pointer.de/blog/projects/resources.html
- Read systemd v228 local root exploit https://lwn.net/Articles/712367/
Related[edit]
systemd-tmpfiles --create- OpenRC
- machinectl
- hostnamectl
- systemd 250
- systemd socket activation (Ubuntu 22.10)
See also[edit]
- Systemd:
systemctl,systemd-journald,journalctlsystemd-cat,systemd-logind,systemd-networkd:networkctl,systemd-timesyncd,systemd-resolved,systemd-udevd[5],Systemd-logind: loginctl,hostnamectl,udevadm,systemd-run,portablectl,systemd-nspawn, systemd resource management, Timer (systemd), systemd logs,/etc/systemd/, systemd services,systemd-mount,/run/systemd/,.service,/usr/lib/systemd/,/usr/lib/systemd/system/,/usr/lib/systemd/system/systemd-resolved.service,/lib/systemd/, machinectl, systemd-oomd, systemd-analyze - macOS:
launctl - systemd, daemontools, runit and https://en.wikipedia.org/wiki/Process_supervision
systemd,runsvcron,crontab,systemctl list-timers, anacron, Kubernetes scheduler, Systemd services,CronJobsStack,cron.schedule,crontab -l,0x004b,at, /etc/cron.deny, /etc/cron.allow, /etc/crontab, /var/spool/cron/crontabs/- elogind
- init (
inittab), supervisor, systemd, upstart,service,chkconfig, OpenRC, s6-svstat
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