Linux boot sequence and run levels
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Linux boot sequence and run levels. since we are only interested in the phases after the kernel has loaded. To establish your machine's current run level, you can run the /sbin/run level command. (See man run level for further details.)

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Linux boot sequence and run levels
Linux boot sequence and run levels

  • since we are only interested in the phases after the kernel has loaded.

  • To establish your machine's current run level, you can run the /sbin/run level command. (See man run level for further details.)

  • Once the kernel has been loaded and has started to run, it calls the /sbin/init program. This program runs as root and sets the "run level" to that requested at initial boot time. (For more details on the init program.


What is a run level
What is a run level?

  • Run level is simply a number that Linux uses to distinguish different types of high-level configurations that the machine should be booted into. These run level numbers are on the whole "well-known," in the sense that most of them have very clearly defined meanings.