A Software Package is usually a software program that provides some functionality bundled with metadata that contains information about the package. And a Package Management System as defined by wikipedia is a collection of tools to automate the process of installing, upgrading, configuring, and removing software packages from a computer. The package management system is more common in unix and unix-like operating systems to operate with multiple packages. A few significant benefits of such a system are
- maintains a Repository of packages available for the running system (OS and Architecture specific) and resolves dependencies among various packages.
- looks up the repository and automatically downloads the requested packages and its dependencies when installation is triggered.
- can be used to easily upgrade the system to a defined release or level.
- system administrators can create repositories of packages which can be pulled by users, thus allowing easy maintenance of systems across the network and centrally stored packages to reduce memory requirements.
Common Package Management Systems are yum (Yellowdog Update Modifier) that is distributed with Fedora and apt (Advanced Packaging Tool) that's distributed with Ubuntu.
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