In Ubuntu, you can navigate to “System Settings -> Software & Updates,” then click “Source code” under “Ubuntu Software.” In Linux Mint (the distribution I’m using because I’m lazy), this can be done by accessing the Update Manager, clicking “Edit,” clicking “Software Sources,” then checking the little box with “Enable source code repositories.” This method may vary depending on your desktop environment and distribution of Linux, so you may need to do a little soul searching to get this done.
