Ivan Evstegneev <bravo_elf <at> gmail.ru> writes: > > What do these levels mean? > They are init runlevels. The runlevels are defined in /etc/inittab. The comment at the top describes them: # Default runlevel. The runlevels used by RHS are: # 0 - halt (Do NOT set initdefault to this) # 1 - Single user mode # 2 - Multiuser, without NFS # 3 - Full multiuser mode # 4 - unused # 5 - X11 # 6 - reboot (Do NOT set initdefault to this) The /etc/rc.d/rc3.d directory symlinks to the services in /etc/rc.d/init.d started and stopped in runlevel 3. The chkconfig program manages the symlinks to control what programs are started in each runlevel. Usually, 2,3,4,5 are managed together; 3 and 5 are the same except X is started in 5 (not by /etc/rc.d mechanism). - Ian
