October 2006
Beginner
658 pages
17h 17m
English
Content preview from Fedora Linux
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Using Runlevels
Fedora can be booted into different runlevels, each of which starts a specific collection of software for a particular purpose. The most commonly used are runlevel 3, which starts the system with a character-based user interface, and runlevel 5, which starts the system with a graphical user interface. Table 4-11 lists the standard runlevels.
Table 4-11. Standard runlevels
| Runlevel | Description | Purpose |
|---|---|---|
s (or S) | Single-user maintenance mode | Emergency system recovery work |
0 | Halt | Stops the system |
1 | Single-user mode | System administration |
2 | (Multiuser without networking) | (Not normally used) |
3 | Multiuser, character-mode | Normal system operation without graphical login; useful for servers |
4 | (Not defined) | (Not normally used) |
5 | Graphical | Normal system operation with graphical login. |
6 | Reboot | Restarts the system |
7, 8, 9, a, b, c | (Not defined) | Available for custom purposes |
The ability to choose the runlevel lets you save system resources (for example, by not running the graphical user interface when it isn’t needed) or start the system in a minimal configuration so that you can fix problems.
How Do I Do That?
You can change the runlevel on the fly, or configure your system to start in a different runlevel.
Choosing the runlevel at boot time
The Fedora boot menu can be used to specify the runlevel:
Press a key (such as the spacebar) when the Fedora Core boot display appears. This will reveal the boot menu.
Select the Fedora Core boot option you wish to use using the arrow keys.
Press the letter a ...
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