Install apt-src by entering the following commands in the terminal:
sudo apt update sudo apt install apt-src
manage Debian source packages
apt-src is a command line interface for downloading, installing, upgrading, and tracking Debian source packages. It makes source package management feel a lot like using apt to manage binary packages, and is being used as a testbed to work on adding source dependencies to Debian. . It can be run as a normal user, or as root. If you want a convenient way to track updates to packages while preserving your local modifications, this is a way to do that.