How to modify the linux Startup Script

How to modify the linux Startup Script

Configuration angular at startup running level
/Etc/inittab

The startup running level init is the command for switching the running level
0. Shutdown // init0
1. single-user mode (Automatically Obtaining Super User Permissions, no network, no service)
2. Multi-user mode (no network or service)
3. SERVER mode (with network and service) the above three modes are character Interfaces
4. Retain
5. Graphic Interface Mode
6. Restart

Id: 5: initdefault:
// The default value is 5 at startup.

The last time I wrote an article on the operating system, I said, if you want to complete others, you just need to change id: 5 here to others. Haha, that's all.