Fedora/Redhat runlevel 

Joined:
04/07/2009
Posts:
49

January 17, 2010 00:15:47
A runlevel is used to group the daemons (services) to start. For the Fedora/Redhat based Linux systems, the primary runlevels are:
  • runlevel 1: Single-User Mode
  • runlevel 2: Multi-User Mode
  • runlevel 3: Multi-User Mode with Networking
  • runlevel 5: X11 (runlevel 3 + X Window System)


The typical workstation runs in runlevel 5. Servers without X-server runs in runlevel 3.

To determine what runlevel you are using:
# /sbin/runlevel

To determine what runlevel your system will boot with:
# cat /etc/inittab | grep :initdefault:
id:5:initdefault:

To switch runlevels (replace RUNLEVEL with appropriate number):
# /sbin/init RUNLEVEL

When you switch runlevel, be sure that you are at a text console so that you don't accidentally kill your session when X-server is killed.
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