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Nix package manager: Nix is a package manager for Linux and other Unix-like systems that makes package management reliable and reproducible. It provides atomic upgrades and rollbacks, side-by-side installation of multiple versions of a package, multi-user package management and easy setup of build environments;
Linux is a Unix-like computer operating system assembled under the model of free and open-source software development and distribution. Most Linux distributions , as collections of software based around the Linux kernel and often around a package management system , provide complete LAMP setups through their packages.
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Package metadata include package description, package version, and dependencies (other packages that need to be installed beforehand). Package managers are charged with the task of finding, installing, maintaining or uninstalling software packages upon the user's command. Typical functions of a package management system include:
Portage during system update. The Portage system offers the use of "USE flags", which allows users to indicate which software features they would like to include (and exclude) while building packages. For example, there is a USE flag to include DVD support, where available, in packages compiled with the flag enabled.
The Yellowdog Updater Modified (YUM) is a free and open-source command-line package-management utility for computers running the Linux operating system using the RPM Package Manager. [4] Though YUM has a command-line interface, several other tools provide graphical user interfaces to YUM functionality.
NixOS is a free and open source Linux distribution based on the Nix package manager.NixOS uses an immutable design and an atomic update model. [4] Its use of a declarative configuration system allows reproducibility and portability.
DNF or Dandified YUM [7] [8] [9] is the next-generation version of the Yellowdog Updater Modified (yum), a package manager for .rpm-based Linux distributions. DNF was introduced in Fedora 18 in 2013; [10] it has been the default package manager since Fedora 22 in 2015, [11] Red Hat Enterprise Linux 8, [12] and OpenMandriva, [13] and is also an alternative package manager for Mageia.