Now how did I do it ? - I needed gnuplot, but after the installation of mp4 playing programs the architecture has been changed and I couldn’t install gnuplot without inconsistences. I accepted them and then things begun to go wrong. I decided to reinstall the the whole system. My /home was not touched, so I hoped to repair everything.
Do you see any chances ?
Yes, that seems to be the situation.
You can try manually running “fsck”. But if it is hopeless, your other alternative is to reformat:
mkfs -t ext4 /dev/dm-1
And I guess I should point out that it might not always be “/dev/dm-1”. The numbering depends on the order of commands during startup. So be cautious about using that name.
It’s hard to guess what happened to the file system.