Linux Learning-boot interface and command prompt

First, modify the default boot interface

Most users now default to the graphical interface, but this misses a good time to learn about the server startup process. We can go back to the command line interface with the relevant commands

Init 2 back to character interface

If you want to enter the command line interface by default, you need to edit the /etc/inittab file and modify the * in the id:*:initdefault field.

Let's look at the contents of the/etc/inittab file first:

Cat/etc/inittab

The contents are as follows:

The meaning of each number in the figure:

0: Turn off the machine

1: Single-user form, only root for maintenance

2: Multi-user, cannot use net file system

3: Full multi-user

4: Safe Mode

5: Graphical

6: restart

Modify I D:*:initdefault * For the specified number, start the default entry to the specified run state, for example id:5:initdefault enters the graphical interface by default.

Second, modify the command line prompt

The command prompt is in the format environment variable PS1 , modify PS1, command prompt changes

However, this modification does not take effect permanently, when we need to modify the ~/.BASHRC file to export ps1= "custom format" add to this file

Linux Learning-boot interface and command prompt