Linux Distributions Explained | Ubuntu, CentOS, Debian and More

Linux Distributions Explained

One of the first decisions a Linux beginner must make is choosing a distribution. A Linux distribution, or distro, is a complete operating system package built around the Linux kernel, bundled with software, a package manager, and a default desktop environment or server configuration. There are hundreds of distributions, but a handful dominate professional and personal use.

Ubuntu

Ubuntu is the most popular Linux distribution for beginners and professionals alike. Maintained by Canonical, it is released every six months with a Long Term Support version every two years. Ubuntu uses the APT package manager and the GNOME desktop by default. Most online Linux tutorials and documentation target Ubuntu, making it the best starting point for learning Linux commands.

CentOS and Red Hat Enterprise Linux

CentOS was a free, community-supported rebuild of Red Hat Enterprise Linux (RHEL). It was widely used in enterprise server environments. In 2021, CentOS shifted to a rolling-release model called CentOS Stream. For enterprise users who need a stable RHEL-compatible system, AlmaLinux and Rocky Linux are now the most popular replacements. These systems use the YUM or DNF package manager.

Debian

Debian is one of the oldest and most stable Linux distributions. It is the upstream base for Ubuntu and many other distros. Debian uses the APT package manager and is known for its strict commitment to free software and its exceptional long-term stability. It is widely used on servers.

Fedora

Fedora is sponsored by Red Hat and serves as a testing ground for new technologies that eventually make their way into RHEL. It uses the DNF package manager and is popular among developers who want the latest software.

Arch Linux

Arch Linux is a minimal, rolling-release distribution aimed at experienced users who want full control over their system. You install only what you need and configure everything manually. It uses the Pacman package manager and has an excellent community wiki.

Choosing the Right Distribution

For beginners learning Linux basics, Ubuntu or Linux Mint are strongly recommended. For server work, Ubuntu Server, AlmaLinux, or Debian are excellent choices. For development workstations, Fedora provides bleeding-edge tooling. All the Linux commands covered in this course apply across distributions, with minor differences in package management.