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Editor to share with you how linux modifies path environment variables, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Linux modifies path environment variables: 1. Modify temporary PATH;2 by "export PATH=/usr/local/mongodb/bin:$PATH", modify current user PATH by ".bashrc file: vim ~ / .bashrc", etc.

This article operating environment: linux5.9.8 system, Dell G3 computer.

How does linux modify the path environment variable?

Linux can modify PATH environment variables in four ways:

There are four ways for Linux to modify PATH environment variables, each with different permissions. Add the mongodb server variable as the column:

1. Modify temporary PATH

Check out PATH:echo $PATH

Modification method 1: export PATH=/usr/local/mongodb/bin:$PATH

/ / after configuration, you can view the configuration results through echo $PATH.

Effective method: effective immediately

Validity period: temporary changes can only be valid in the current terminal window. The original path configuration will be restored when the current window is closed.

User limitations: for current users only

two。 Modify the PATH of the current user

By modifying the .bashrc file: vim ~ / .bashrc

/ / add: export PATH=/usr/local/mongodb/bin:$PATH on the last line

Effective method: (there are two kinds)

1. Close the current terminal window and reopen a new terminal window to take effect

2. Enter the "source ~ / .bashrc" command to take effect immediately.

Term of validity: permanent

User limitations: for current users only

3. Modify the PATH of all users

By modifying the profile file: vim / etc/profile/export PATH

/ / find the line that sets the PATH, and add:

Export PATH=/usr/local/mongodb/bin:$PATH

Effective method: system restart

Term of validity: permanent

User limitations: for all users

4. Modify the PATH of the system environment

By modifying the environment file: vim / etc/environment

Add ": / usr/local/mongodb/bin" to PATH= "/ usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"

Effective method: system restart

Term of validity: permanent

User limitations: for all users

These are all the contents of the article "how linux modifies path environment variables". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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