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Linux Learning Notes (vi) installation and uninstallation of-linux service programs

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Author: User
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  1. Operating level of Linux OS
    1 single-user mode, root privileges, for system maintenance, prohibit remote logins, just like the Safe mode login under Windows.
    2 Multi-user mode, no NFS network support
    3 full multi-user text mode with NFS, login and enter console command line mode
    4 system unused, reserved generally not used, in some special cases can use it to do something
    5 graphical mode, after landing into the graphical GUI mode, X Window System
    6 Restart mode, default run level cannot be set to 6, otherwise it will not start normally
    Show current Run level command: RunLevel; go to other runlevel: init level


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Linux Learning Notes (vi) installation and uninstallation of-linux service programs

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