This is an index of systemd documentation.
Tutorials
HOWTOs
systemd/howtos/WaitOnline: stop waiting for being online at boot if you don't need it
In-depth explanations
systemd/Services: a basic explanation
On the difference between disable and mask: Mask V Disable a Systemd Service Unit, systemd: Masking units The Three Levels of "Off"
Reference documentation
systemd manpages are detailed and extensive, and are generally the main reference documentation for all its features.
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Contribute to this index
This is a link to tutorials, howtos, explanations and reference material, grouped according to this distinction.
If you find a linkable resource that you found useful to get started, solve a problem, gain deeper understanding, or use as reference material for building on systemd, please share a link to it here.
Other init systems
Please add here links to similar pages for other init systems available in Debian.