Linux Kernel & Boot Errors: GRUB, kernel panic, initramfs, emergency mode
Working reference for the 10 most common Linux boot failures. Kernel panic - not syncing (UUID/initramfs/hardware), GRUB file not found, VFS unable to mount root (post-disk-replace UUID change), systemd emergency mode from failed mount, no init found, missing initramfs modules, fsck during boot, OOM in initramfs on small VMs, kernel command line parse errors, silent boot loops. Cross-linked to disk/filesystem and storage/RAID.