RSS Operating System tutorial ¶ OS definition Wikipedia definition GNU/Linux Operating Systems GNU/Linux Debian based Operating Systems GNU Linux/mint Ubuntu Debian versions NixOS NixOS definition GNU/Linux RPM based Operating Systems Fedora GNU/Linux kernel GNU/Linux kernel definition Wikipedia definition Commands journalctl systemctl GNU/Linux kernel versions GNU/Linux kernel 6.3 (2023-04-23) GNU/Linux kernel 6.2 (2023-02-19) GNU/Linux kernel 6.1 (2022-12-11) GNU/Linux kernel 6.0 (2022-10-02) GNU/Linux kernel 5.0 (2019-03-04) News 2023 2023-05