Rocky Linux

Rocky Linux is an open-source enterprise operating system designed to be 100% bug-for-bug compatible with Red Hat Enterprise Linux®. It is under intensive development by the community.

Debian

Debian is a free operating system (OS) for your computer. Debian provides more than a pure OS: it comes with over 51000 packages, precompiled software bundled up in a nice format for easy installation on your machine.

CentOS 7

CentOS is a Linux distribution that attempts to provide a free, enterprise-class, community-supported computing platform functionally compatible with its upstream source, Red Hat Enterprise Linux (RHEL).In January 2014, CentOS announced the official joining with Red Hat while staying independent from RHEL,under a new CentOS governing board.

Ubuntu

Ubuntu is a Debian-based Linux operating system for personal computers, tablets and smartphones, where Ubuntu Touch edition is used. It also runs network servers. That is usually with the Ubuntu Server edition, either on physical or virtual servers (such as on mainframes) or with containers, that is with enterprise-class features. It runs on the most popular architectures, including server-class ARM-based.

Mint

Linux Mint is a community-driven Linux distribution based on Debian and Ubuntu that strives to be a "modern, elegant and comfortable operating system which is both powerful and easy to use."Linux Mint provides full out-of-the-box multimedia support by including some proprietary software and comes bundled with a variety of free and open-source applications.

Arch Linux

Arch Linux, a lightweight and flexible Linux® distribution that tries to Keep It Simple.

Raspbian

Raspbian is a Debian-based computer operating system for Raspberry Pi.

Fedora

Fedora is a Linux distribution developed by the community-supported Fedora Project and sponsored by Red Hat. Fedora contains software distributed under various free and open-source licenses and aims to be on the leading edge of such technologies.

Alpine Linux

Alpine Linux is a security-oriented, lightweight Linux distribution based on musl libc and busybox.

Manjaro

Manjaro is an operating system, suitable as a free replacement to Windows or MacOS. It has different editions, they all use the same base but provide a different experience, based on the diversity of desktop environments available.

OpenSUSE

The makers' choice for sysadmins, developers and desktop users.

CTAN

The Com­pre­hen­sive TeX Archive Net­work (CTAN) is the cen­tral place for all kinds of ma­te­rial around TeX.

OpenBSD

Only two remote holes in the default install, in a heck of a long time!