The runlevel is specified in the /etc/inittab file. Different runlevels and details are listed below:
0 - halt (Do NOT set initdefault to this) 1 - Single user mode 2 - Multiuser, without NFS (The same as 3, if you do not have networking) 3 - Full multiuser mode 4 - unused 5 - X11 6 - reboot (Do NOT set initdefault to this)
The default runlevel means the runlevel of the Linux system which is appearing by-default after a reboot.
You can findout the current runlevel by executing the following command:
grep id: /etc/inittab
[root@localhost ~]# grep id: /etc/inittab id:5:initdefault:
How to change the default runlevel?
you can change it simply by editing the line which has the runlevel id:
vi /etc/inittab ----- id:5:initdefault: -----
Then reboot to get the changes which you have made.
That’s it..!! 🙂