Linux Kernel Crashes and kdump: Installing a Flight Recorder for Your Servers
Overview 3 AM. Your alarm goes off. You log into the server and see a single line on the screen: Kernel panic - not syncing: Fatal exception. Then the system reboots. When you finally get back in, the crash scene is completely gone — no logs, no core dump, no call trace. You stare at systemd-logind: System is going down with nothing to work with. If you’ve been in ops for a few years, you’ve been there....