MSYS2
MSYS2 is a collection of tools and libraries providing you with an easy-to-use environment for building, installing and running native Windows software. It consists of a command line terminal called mintty, bash, version control systems like git and subversion, tools like tar and awk and even build systems like autotools, all based on a modified version of Cygwin. Despite some of these central parts being based on Cygwin, the main focus of MSYS2 is to provide a build environment for native Windows software and the Cygwin-using parts are kept at a minimum. MSYS2 provides up-to-date native builds for GCC, mingw-w64, CPython, CMake, Meson, OpenSSL, FFmpeg, Rust, Ruby, just to name a few. To provide easy installation of packages and a way to keep them updated it features a package management system called Pacman, which should be familiar to Arch Linux users.
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DNF
DNF is a software package manager that installs, updates, and removes packages on Fedora and is the successor to YUM (Yellow-Dog Updater Modified). DNF makes it easy to maintain packages by automatically checking for dependencies and determining the actions required to install packages. This method eliminates the need to manually install or update the package, and its dependencies, using the rpm command. DNF is now the default software package management tool in Fedora. Removes packages installed as dependencies that are no longer required by currently installed programs. Checks for updates, but does not download or install the packages. Provides basic information about the package including name, version, release, and description.
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Homebrew
The missing package manager for macOS (or Linux). The script explains what it will do and then pauses before it does it. Homebrew installs the stuff you need that Apple (or your Linux system) didn’t. Homebrew installs packages to their own directory and then symlinks their files into /usr/local (on macOS Intel). Homebrew won’t install files outside its prefix and you can place a Homebrew installation wherever you like. Trivially create your own Homebrew packages. It’s all Git and Ruby underneath, so hack away with the knowledge that you can easily revert your modifications and merge upstream updates. Homebrew formulae are simple Ruby scripts. Homebrew complements macOS (or your Linux system). Install your RubyGems with gem and their dependencies with brew. Homebrew Cask installs macOS apps, fonts and plugins and other non-open source software. Making a cask is as simple as creating a formula.
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Synaptic
Synaptic is a graphical package management program for apt. It provides the same features as the apt-get command-line utility with a GUI front-end based on Gtk+. Install, remove, upgrade and downgrade single and multiple packages. Upgrade your whole system. Manage package repositories (sources.list). Find packages by name, description, and several other attributes. Select packages by status, section, name, or a custom filter. Sort packages by name, status, size, or version. Browse all available online documentation related to a package. Download the latest changelog of a package. Lock packages to the current version. Force the installation of a specific package version. Undo/Redo selections. Built-in terminal emulator for the package manager. Debian/Ubuntu only, configure packages through the debconf system. Debian/Ubuntu only, Xapain-based fast search (thanks to Enrico Zini).
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