MySQL server vanished

Hi, MySQL server is vanished and I don’t know why. Restoring previous (and stable) backups won’t help at all. Running htop command, there are no instances of mysql is shown and service mysql restart gives the following error:

stop: Unknown instance: start: Job failed to start

I checked if it’s installed by apt-get install mysql-server: “mysql-server is already the newest version.” I don’t want to remove and re-install it because I don’t want to lose existing tables.

Command “mysql” gives this error: ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock’ (2)

Any ideas what might the problem be?

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