Booting PCs (more options)
LILO/GRUB: Booting Linux
Multibooting PCs
Booting in single-user mode
shutdown
halt and reboot
Send init a TERM signal
telinit
/etc/inittab (tells init where scripts are)
/etc/init.d (script directory)
/etc/rc2.d (link to script directory)
ROM
Load and initialize kernel
Device detection
System processes (init is process 1)
Single user mode (manual boot only)
Startup scripts
Multi-user logins
Level 0 – shutdown
Level 1 or S – single-user mode
Level 2 thru 5 – multi-user mode
Level 6 – reboot
Automatic
Manual (single-user mode)