APT
This software lets you follow the evolution of a Debian-based distribution both with email updates and with a comprehensive web interface. Having all the information about packages conveniently available in a single place is particularly interesting for package maintainers, contributors, advanced users, etc.
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Debian
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Debian is a free, open-source Linux operating system developed and maintained by a global community of volunteers. The distribution provides a stable and customizable computing environment for desktop computers, laptops, servers, cloud infrastructure, and embedded systems. Debian includes more than 70,000 software packages covering productivity applications, programming tools, databases, web servers, networking utilities, and system administration. Its Advanced Package Tool (APT) simplifies software installation, dependency management, security updates, and system upgrades. Users can choose from desktop environments such as GNOME, KDE Plasma, Xfce, Cinnamon, MATE, and LXQt or configure lightweight systems without a graphical interface. Debian supports multiple hardware architectures and offers Stable, Testing, and Unstable development branches to accommodate different requirements for reliability and software availability.
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fpm
fpm is a tool that lets you easily create packages for Debian, Ubuntu, Fedora, CentOS, RHEL, Arch Linux, FreeBSD, macOS, and more! fpm isn’t a new packaging system, it’s a tool to help you make packages for existing systems with less effort. It does this by offering a command-line interface to allow you to create packages easily. FPM is written in ruby and can be installed using gem. For some package formats (like rpm and snap), you will need certain packages installed to build them. Some package formats require other tools to be installed on your machine to be built; especially if you are building a package for another operating system/distribution. FPM takes your program and builds packages that can be installed easily on various operating systems. It can take any nodejs package, ruby gem, or even a python package and turn it into a deb, rpm, pacman, etc. package.
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DPKG
DPKG is a tool to install, build, remove and manage Debian packages. The primary and more user-friendly front-end for DPKG is aptitude. DPKG itself is controlled entirely via command line parameters, which consist of exactly one action and zero or more options. The action parameter tells DPKG what to do and options control the behavior of the action in some way. DPKG can also be used as a front-end to DPKG-deb(1) and DPKG-query. The list of supported actions can be found later on in the actions section. If any such action is encountered DPKG just runs DPKG-deb or DPKG-query with the parameters given to it, but no specific options are currently passed to them, to use any such option the back-ends need to be called directly. DPKG maintains some usable information about available packages. The information is divided into three classes, states, selection states, and flags. These values are intended to be changed mainly with dselect.
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