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LinuxWorld: Run levels revisited - What happens when linux startsJan 05, 2001, 07:11 (0 Talkback[s])(Other stories by Joshua Drake) "Linux is not like other operating systems such as MS-DOS and Windows 9x. Linux is its own beast. Quite a few would call Linux a UNIX clone, but I don't think that is fair to Linux. Linux is much more open and capable than most UNIX systems." "When Linux starts, it calls a program named init, which runs all subsequent startup tasks. Those tasks include the multiuser environment, networking, and services such as sendmail." "The run level is just that -- the level of functionality in which the operating system is running. The levels range from level 1 to level 6, and each level has a different degree of functionality. The run levels are specified within the /etc/inittab file. /etc/inittab is the master file in which the init program looks to execute its subsequent services. The very first services it executes are those located in the /etc/rc.d directory tree." Related Stories:
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