These packages are distributed in a Debian-specific archive format they are usually distinguished by having a '.deb' file extension.
Note that format is used by Ubuntu and several other distributions, like debian, Mint, etc...I hope this helps a bit; not all distributions use package managers, so if you want to learn more about the "old ways" you can try things like Slackware or Gen Too!That may tell you more than you'll be comfortable learning are packages with (normally) compiled programs that someone compiled, installed, configured and adapted to a specific operating system.The program apt-get can get used a frontend for dpkg-source.m0n0wall was a project aimed at creating a complete, embedded firewall software package that, when used together with an embedded PC, provides all the important features of commercial firewall boxes (including ease of use) at a fraction of the price (free software).Tmosb is also included in this release (1.9.9), allowing you to do the same; it can build more then 3,000 operating systems.
This release is NOT a long-term supported (LTS) release; it was built in anticipation of the Ryzen build, same as Ultimate Edition 5.4, both rock on an AMD Ryzen.
m0n0wall was probably the first UNIX system that has its boot-time configuration done with PHP, rather than the usual shell scripts, and that has the entire system configuration stored in XML format.
Status: Ultimate Edition developer "Thee Mahn" has announced a release of a new build of Ultimate Edition.
and even if you can install a debian in Ubuntu and often it will work, is not guaranteed so.
Other distributions have different packaging systems (rpm, pacman, even gz for slackware).
Source packages, which consist of a file describing the source package (including the names of the following files), a file that contains the original unmodified source in gzip-compressed tar format and usually a gz file that contains the Debian-specific changes to the original source.