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→Init process: Copyedit (minor); also as per MOS:CONTRACTION |
Guy Harris (talk | contribs) →Init process: "runlevel" is a term from System V, and applies to the SV init. systemd has units that it starts. Leave init-subsystem details out of the first paragraph; they belong in the summaries below. |
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== Init process ==
Once the kernel has started, it starts the [[init]] process,{{Sfn|M. Tim Jones|2006|loc=, "Init"}} a [[Daemon (computing)|daemon]] which then [[Bootstrapping#Software loading and execution|bootstraps]] the [[user space]], for example by checking and mounting [[file system]]s, and starting up other [[Process (computing)|processes]]. The init system is the first daemon to start (during booting) and the last daemon to terminate (during [[Shutdown (computing)|shutdown]]).
Historically this was the "SysV init", which was just called "init". More recent Linux distributions are likely to use one of the more modern alternatives such as [[systemd]]. Below is a summary of the main init processes:
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