Novell LINUX ENTERPRISE DESKTOP 10 SP2 - DEPLOYMENT GUIDE 08-05-2008 Deployment Manual page 411

telinit 6 or shutdown -r now
The system halts then reboots.
Runlevel 5 is the default runlevel in all SUSE Linux Enterprise standard installations.
Users are prompted for login with a graphical interface or the default user is logged in
automatically. If the default runlevel is 3, the X Window System must be configured
properly, as described in
level can be switched to 5. If this is done, check whether the system works in the desired
way by entering telinit 5. If everything turns out as expected, you can use YaST
to set the default runlevel to 5.
WARNING: Errors in /etc/inittab May Result in a Faulty System Boot
If /etc/inittab is damaged, the system might not boot properly. Therefore,
be extremely careful while editing /etc/inittab. Always let init reread
/etc/inittab with the command telinit q before rebooting the machine.
Generally, two things happen when you change runlevels. First, stop scripts of the
current runlevel are launched, closing down some programs essential for the current
runlevel. Then start scripts of the new runlevel are started. Here, in most cases, a number
of programs are started. For example, the following occurs when changing from runlevel
3 to 5:
1. The administrator (root) requests init to change to a different runlevel by entering
telinit 5.
2. init checks the current runlevel (runlevel) and determines it should start /etc/
init.d/rc with the new runlevel as a parameter.
3. Now rc calls the stop scripts of the current runlevel for which there is no start
script in the new runlevel. In this example, these are all the scripts that reside in
/etc/init.d/rc3.d (old runlevel was 3) and start with a K. The number
following K specifies the order to run the scripts with the stop parameter, because
there are some dependencies to consider.
4. The last things to start are the start scripts of the new runlevel. In this example,
these are in /etc/init.d/rc5.d and begin with an S. Again, the number that
follows the S determines the sequence in which the scripts are started.
Chapter 23, The X Window System (page 481), before the run-
Booting and Configuring a Linux System 395