Roughly speaking, environmental variables may be thought of as the configuration files for a user account. Operating behind day-to-day operations, environmental variables define the resources available to an account. While it is perfectly possible to ignore environmental variables when running a Linux account, you may need to edit them sometimes to correct a gap in functionality, especially after new packages are installed. For this reason, it makes sense to know how to set, modify, and delete environmental variables. On networks, you’ll also want to safeguard them against security breaches.
Structurally, environmental variables resemble the fields found in most applications’ configuration files. For instance, Python’s setting.py contains such variables as $ENGINE, $HOST, and $POST. Some of these applications are global, such as the systemd variables contained in/etc/experiment.d, which include the resources…
