How to enter character interface and window mode in CentOS?

How to enter the character interface and window mode of CentOS: 1. The system running level is 3. After the system is started, you can enter the character login CentOS interface; 2. The system running level is 5. After the system is started, you can enter the graphical login CentOS. interface.

How to enter the character interface and window mode of CentOS:

Entering the character CentOS interface can be entered from the system run level

Linux system runs on a designated run level at any time, and the programs and services of different run levels are different, and the work to be completed and the purpose to be achieved are different. Centos has set up run levels as shown in the following table, and the system can switch between these run levels to complete different tasks. Run level description

0 All processes will be terminated, the machine will stop in an orderly manner, and the system will be in this run level when shutting down

1 Single user mode. For system maintenance, only a few processes are running, and all services are not started

2 Multi-user mode. Same as run level 3, except that the Network File System (NFS) service is not started

3 Multi-user mode. Allowing multiple users to log in to the system is the system's default startup level

4, leaving the user-defined run level

5 multi-user mode, and running X-Window after the system starts, given A graphical login window

6 All processes are terminated and the system is restarted

If the system enters the character login CentOS interface after startup, the default run level of the system is 3; If the system enters the graphical login CentOS interface after startup, it means that the system's default run level is 5.

If the user has started the character CentOS interface and wants to enter the graphical CentOS interface, he can use the following command:

$ startx &

Run-level viewing and switching

Users can use the following command to view the runlevel runlevel of the current system. Users can use the following command to switch the runlevel init [0123456Ss], that is, the init command is followed by a parameter. This parameter is the runlevel code of the runlevel to be switched to. For example:

• Use the init 0 command to switch to run level 0, that is, shut down

• Use the init 1 command to switch to run level 1, that is, enter Single-user running mode

• Use the init 6 command to switch to run level 6, that is, restart

You can also use the te linit command in CentOS , the te linit command is a symbolic link to the init command.

Related tutorial recommendations: centos tutorial

The above is the detailed content of How to enter character interface and window mode in CentOS?. For more information, please follow other related articles on the PHP Chinese website!