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    There r differences in the runlevels according to the operating system. Nearly 7 runlevels r supported in the standard Linux kernel (i.e., core of the operating system). They are:
    0 - System halt; no activity, the system can be safely powered down.
    1 - Single user; rarely used.
    2 - Multiple users, no NFS (network filesystem); also used rarely.
    3 - Multiple users, command line (i.e., all-text mode) interface & Network support; the standard runlevel for most Linux-based server hardware.
    4 - Not used/User-definable; For special purposes.
    5 - Multiple users, GUI (graphical user interface); the standard runlevel for most Linux-based desktop systems.
    6 - Reboot; used when restarting the system.

    As u mentioned here 3,4 and 5, for ur info 4 is not used but yes, 3 and 5 are generally used for networking purpose.

    Answered by rechil_colin
    2 years ago
    0 2
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