Explain what a package manager is in the Linux operating system and what role it performs.

A package manager in Linux is a tool that automates the process of installing, updating, configuring, and removing software. It works with packages — archives containing the program and metadata (dependencies, versions, etc.).

Role of a package manager:

• Dependency management: automatically installs necessary libraries.
• Software updates: simplifies updating all programs to the latest versions.
• Centralized storage: packages are taken from repositories, which enhances security and convenience.

Examples of package managers:

• apt (Debian, Ubuntu)
• yum/dnf (Fedora, CentOS)
• pacman (Arch Linux)

Example of installing a package via apt:

sudo apt update
sudo apt install nginx