An rpm package file is a file that contains all the software associated with a particular application. It ends with the .rpm extension, for example netscape-communicator-4.71-i586.rpm
When the package is installed, using the rpm –i option, the package name is officially entered in the system package database as the application name and version, i.e. netscape-communicator-4.71 . Therefore, to remove the package, you need use the package name – not the full name of the file that you used to install the package.
init reads /etc/inittab , which designates what runlevel to start. A runlevel of initdefault is selected unless otherwise designated.
A runlevel determines what functionality the system should be providing. Run levels include: 0 Halt the system 1 Single-user (no networking) 2 Multiuser without NFS 3 Multiuser with NFS 4 Unused 5 Same as 3 but with X11 console 6 Reboot the system