How to solve a problem with Linux?

Question

linux

There was a problem booting Ubuntu 20.04. When loading kernel panic not syncing vfs unable to mount root fs on unknown-block 0 0. Before that, I updated the system (it took a long time somehow). How to solve the problem? Now I sit through LiveCD. Totally new to Linux

Answer 1

"Ready for desktop".
Boot into the LiveCD and fsck the root partition.
It can't load the system partition, fsck can help.

Answer 2

I'm not sure what Ubuntu has, but look for a system restore tool or something similar. The result is not guaranteed, but worth a try.