December 2012
Intermediate to advanced
888 pages
48h 24m
English
Content preview from Ubuntu Unleashed 2013 Edition: Covering 12.10 and 13.04, Eighth EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Booting into the Default Runlevel
Ubuntu boots into runlevel 2 by default, which means it starts the system as normal and leaves you inside the X Window System looking at the graphical login prompt. It knows what runlevel 2 needs to load by looking in the rc*.d directories in /etc. Ubuntu contains directories for rc0.d through to rc5.d and rcS.d.
Assuming that the value is 1, the rc script executes all the scripts under the /etc/rc.1 directory and then launches the graphical login.
If Ubuntu is booted to runlevel 1, for example, scripts beginning with the letter K followed by scripts beginning with the letter S under the /etc/rc1.d directory are then executed:
matthew@seymour:~$ ls /etc/rc1.d/K10jackd K20rsync K20vboxdrv K80cups S70pppd-dns ...
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