by George Whittaker One of the most widely deployed Linux kernels has officially reached the end of its lifecycle. The maintainers of the Linux kernel have confirmed that Linux 5.4, once a cornerstone of countless servers, desktops, and embedded devices, is now end-of-life (EOL). After years of long-term support, the branch has been retired and will no longer receive upstream fixes or security updates. A Kernel Release That Defined a Generation of Linux Systems When Linux 5.4 debuted, it made headlines for bringing native exFAT support, broader hardware compatibility, and performance improvements that many distributions quickly embraced. It became the foundation for major OS releases, including Ubuntu LTS, certain ChromeOS versions, Android kernels, and numerous appliance and IoT devices. Its long support window made it a favorite for organizations seeking stability over bleeding-edge features. What End-of-Life Actually Means With the EOL announcement, the upstream kernel maintainers a