The Perl interpreter and core modules are installed by default on all Debian- and Ubuntu-based Linux systems; however, the Perl documentation package is usually not. You can download the Perl documentation onto your Debian or Ubuntu Linux system. If you do not require the Perl documentation program, you can skip this section.
Debian and Ubuntu systems use the DEB packaging format. You can use the program suite called Advanced Package Tool, or APT, for downloading, installing, upgrading, and removing DEB packages. APT is standard on all Debian and Ubuntu systems, for more information see
The APT repository that houses the Perl DEB packages tends ...