How do I remove an environment variable in Linux?

How do I remove an environment variable in Linux?

You can remove an environment variable in Linux using the unset command. For example, to remove a variable named MY_VAR, you would use: unset MY_VAR.

Will this change be permanent?

No, using unset will only remove the variable for the current session. To make it permanent, you need to remove it from your shell configuration file, like ~/.bashrc or ~/.bash_profile.

How do I check if the variable is removed?

You can check if the variable is removed by using the echo command. For example, echo $MY_VAR should return nothing if it has been successfully removed.

What if I want to remove multiple variables?

You can unset multiple variables in one command by listing them: unset VAR1 VAR2 VAR3. Just replace VAR1, VAR2, and VAR3 with the names of the variables you want to remove.