Windows Linux Tips: Default boot mode

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When a Linux system boots, it loads the kernel, all its drivers, and the networking servers, then the system
will display a text login prompt. There, users can enter their user names and their passwords. But it doesn't
have to boot this way.

There are 3 modes defined in most Linux distributions that can be used for booting. They are defined in
/etc/inittab and have specific numbers. The first mode, also called runlevel 1, is single user mode. That mode
will only boot the system for 1 user, with no networking. Runlevel 3 is the default mode.

 It will load the networking servers and display a text login prompt. Runlevel 5 is the graphical mode. If you have X Window installed and configured, you can use it to display a graphical login prompt.The way to change this is to edit /etc/inittab and change the initdefault line:id:3:initdefault: Changing a 3 to a 5 will make the system display a xdm graphical screen on bootup.

"Windows Linux Tips: Default boot mode"