The GNU/Linux operating system was created by Linus Torvalds in 1991 and has since grown through the collaborative efforts of top programmers worldwide, resulting in numerous distributions.1. Red Hat Family: Fedora, RHEL, CentOS, Rocky Linux2. Debian Family: Debian, Ubuntu, Mint, Deepin, Raspbian3. SUSE Family: SUSE Linux Enterprise, openSUSE4. Other Distributions: Arch Linux, Gentoo, Slackware, etc.