How to use the unset command: 2-Minute Linux Tips

The video tutorial explains the 'unset' command, which removes environment variables from a login session. It provides an example of setting and unsetting a variable, discusses the persistence of environment variables, and how to manage them using the bashrc file. Additionally, it covers how to restore variables that were unset by mistake.

Explain the role of the bashrc file in managing environment variables.

How can you restore a variable that you have unset by mistake?