Ubuntu system start-up process, add/delete startup

Depends on the graphics system
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GUI settings

Click on the menu: System->preferences->sessions, Chinese as: System-> Preferences-> start the application. This is a program that automatically runs after you start the graphical interface

Modify configuration file

Enter the ~/.config/autostart directory to create a file with the name plus. Desktop, such as: Thunderbird.desktop

Not dependent on the graphics system

Init

The Linux kernel launches init, the INIT process ID is 1, is the parent process of all processes, and all processes are controlled by it.

/etc/event.d

The Ubuntu startup is controlled by upstart, and since 9.10 no longer uses the/ETC/EVENT.D directory configuration file to init.

RunLevel

To view the current run level, the Ubuntu desktop defaults to 2.

Runlevelubuntu System Run Level:

0 System shutdown Status
1 single user or system maintenance status
2~5 multiuser Status
6 reboot
S
Switch run level, execute command:

init [0123456Ss] is followed by a parameter after the init command, which is the run-level code to switch to, such as: Shutdown with init 0 command, and restart with the Init 6 command.