Linux modified terminal display prefix and environment variables

A long list is displayed by default in front of the Linux terminal, such as:

[Email protected] dir]$

This is determined by the PS1 environment variable:

[Email protected] dir]$ echo $PS 1
[\[email protected]\h \w]\$

Where \u represents the user, \h represents the host, \w represents the directory

There are three ways to modify environment variables:

1. Direct modification, only works for the current shell

[[email protected] dir] $PS 1= ' [\[email protected] \w]\$ '
[[email protected] dir] $PS 1= ' [\[email protected]\h \w]\$ '
[Email protected] dir]$

or modify the environment variable with the Export command:

[[email protected] dir] $export ps1= ' [\[email protected] \w]\$ '
[[email protected] dir] $export ps1= ' [\[email protected]\h \w]\$ '
[Email protected] dir]$

2. Modify the BASHRC file in the user's home directory

At the bottom of the ~/.BASHRC file, add:

Export ps1= ' [\[email protected] \w]\$ '

Then go back to the shell and run bash to see the effect, and every login will take effect.

[Email protected] dir]$ bash
[Email protected] ~]$

3. Modify/etc/profile, but this generally requires root privileges.

Linux modified terminal display prefix and environment variables