2004-01-21 Fedora Tips 19:
If you want to boot your machine with a different run level (single user, text login, etc). You can do:
Add the run level number as a parameter. For example, to boot in single user mode (runlevel 1)
LILO Boot: linux 1
Highlight the kernel to load and press the 'e' key (editor), now highlight the kernel line and press 'e' again. Goto the end of the line and add the runlevel number. For example:
kernel /vmlinuz-2.4.22-1.2140.nptl ro root=/dev/hda2 rhgb 1
Press ENTER, and then 'b' to boot. Alternately you can also change initdefault parameter in /etc/iniitab. - submitted by Franco Catrin L.