Linux Startup and Shutdown:


init 0
-It will set to Runlavel to init 0.when will system on , check with runlevel but set to init 0.
Generate to shutdown system.
init 1
-For server maintenance or single user mode(only used for supper user). when will single user mode is enabled automatically
server is enabled automatically server is down.
-So single user is disabled in server network will on time.
init 2
-Multiuser mode without NFS. It will not be shared to server linux system.
init 3
_Multiuser with nfs and Character based Interface but without GUI.
init 4
-It is not used at this time. It is reserve for future enhancement.
init 5
-Multiuser with GUI.This is default runlevel of linux.
init 6
-reboot the server or a client system.