env – Displays the environment variables that exist in the system

The env command is used to display the environment variables that exist in the system. Environment variables are a set of dynamic named values that can affect the way running processes will behave on a computer. They are used to store information such as system configuration settings, user preferences, and other data that is required by running processes.

Overview

The env command can be used to display all the environment variables that exist in the system. To use the command, simply type env in the terminal and press Enter. The output will display all the environment variables in the system.

$ env

You can also use the env command to display the value of a specific environment variable. To do this, type env followed by the name of the environment variable. For example, to display the value of the PATH environment variable, type:

$ env PATH

This will display the value of the PATH environment variable.

Options

The env command has the following options:

Troubleshooting Tips

If you are having trouble with the env command, try the following troubleshooting tips:

• Make sure you are typing the command correctly. Check for typos and spelling errors.
• If you are trying to display the value of a specific environment variable and it is not working, make sure you are typing the name of the variable correctly.
• If you are still having trouble, consult the documentation or seek help from a Linux expert.

Notes

• The env command is often used in shell scripts to set environment variables for specific commands or processes.
• The -i option is useful when you want to start a process with a clean environment, without any environment variables from the current session.
• The -u option is useful when you want to unset a specific environment variable.