18.4 fails to boot even in safe mode with a final note of Failure: file system check of root filesystem failed The root file system on /dev/sda4 requirs a manual fsck It then ends at (iniramfs)
I don't know how to do a manual fsck
System will boot into 13.4. If done in safe mode fsck runs OK with no warning. However Update boot loader causes a lock up
Is there a way to recover?
fsck
would fix anyway. Try booting with your Live USB and run boot-repair: https://askubuntu.com/questions/1104855/how-to-make-grub-menu-appear-instead-grub-minimal-bash-like-in-booting/1105737#1105737 – WinEunuuchs2Unix Nov 21 '19 at 03:53