Ubuntu 18.04 can't boot (emergency mode)

Question

After shutting down the PC too many times while the kernel is loading my Ubuntu 18.04 doesn't boot anymore. It falls into emergency mode the grub wasn't showing before:`

The black screen after I select Ubuntu from the grub boot menu:

I ran journalctl -xb and this is what I got:

I don't know what's causing these errors, but after reading some questions here I think that the problem is related to disk partitions. after running cat /etc/fstab:

after running lsblk -f:

Solution

This happened to me too, and it took me a bit of time to realize it was due to a bad entry in my /etc/fstab... I was setting up multiple OSes on different partitions, and at some point one of the partitions' UUID changed, so when I booted a previously working OS, it failed because it didn't find the UUID defined in /etc/fstab.

To fix it I simply commented out using # the unmountable partition, then rebooted. I later was able to remount the desired partition.

Comments

[user535733]

Looks like you damaged your filesystem. That can happen when you shutdown uncleanly (don't do that anymore). Look up how to run fsck to repair your filesystem.