The MySQL Service won´t start?!

[Luka Hlawatschke]

Hey.

I had MySQL installed on my Server with Debian 8. All worked finde a dew days with Joomla. but Today it says: "Error displaying the error page: Application Instantiation Error: Could not connect to MySQL."

So i looked in PuTTY and tryed to start the MySQL service.
But then The error: "[....] Starting mysql (via systemctl): mysql.serviceFailed to start mysql.service: Unit mysql.service failed to load: No such file or directory.
failed!"

Now i dont know what to do.

I´m not very experienced with the Server. Everytime i just installed it and it worked fine :D

Please help!