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How to define the Linux system runlevel and how do I determine which runlevel my system is currently in?

April 26, 2017Currently define determine linux runlevel system

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How to define the Linux system runlevel and how do I determine which runlevel my system is currently in?

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A. You need to use runlevel command to find the current and previous system runlevel. Usaully 0-6 runlevel are used by all Linux distributions: => 0 : Halt system => 1 : Take system to single-user mode (good for Linux system maintenance) => 2 : User defined or distribution like Debian use it => 3 : Full multi-user mode (text mode login) => 4 : Not used/user-defined => 5 : Full multi-user GUI mode login => 6 : Reboot system Please note that runlevels 0, 1, and 6 are reserved. Runlevel 0 is used to halt the system, runlevel 6 is used to reboot the system, and runlevel 1 is used to get the system down into single user mode.