How to modify the path environment variable in Linux

How to modify the path environment variable in Linux: 1. Modify the temporary PATH through "export PATH=/usr/local/mongodb/bin:$PATH"; 2. Through ".bashrc file: vim ~ /.bashrc" to modify the current user PATH, etc.

The operating environment of this article: linux5.9.8 system, Dell G3 computer.

How to modify the path environment variable in Linux?

Four ways to modify the PATH environment variable in Linux:

There are four ways to modify the PATH environment variable in Linux, each method has different permissions. Take the column of adding mongodb server variables:

1. Modify the temporary PATH

View PATH: echo $PATH
Modification method 1: export PATH=/usr/local/mongodb/bin:$PATH
//After configuration, you can view the configuration results through echo $PATH.
Validation method: Effective immediately
Validity period: Temporary change, only valid in the current terminal window. The original path configuration will be restored after the current window is closed.
User limitations: only for the current user

2. Modify the current user’s PATH

By modifying the .bashrc file:vim ~/.bashrc
//Add in the last line: export PATH=/usr/local/mongodb/bin:$PATH
Effective method: (there are two following)
1. Close The current terminal window, reopen a new terminal window to take effect
2. Enter the"source ~/.bashrc"command, it will take effect immediately
Validity period: permanent
User limitations: Only for the current user

3. Modify the PATH of all users

By modifying the profile file:vim /etc/profile/export PATH
//Find the line that sets PATH and add:
export PATH=/usr/local/mongodb/bin:$PATH
Validity method: System restart
Validity period: Permanently valid
User limitations: for all users

4. Modify the PATH of the system environment

By modifying the environment file:vim /etc/environment
In PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/ games"中Join":/usr/local/mongodb/bin"
Effective method: System restart
Validity period: Permanently valid
User limitations: For all users

Recommended learning: "linux video tutorial"

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