Where is the MySQL data held for all the sites?

[spuppy]

Where are MySQL databases stored on a hard drive? Like, how do we restore the data without having MySQL running?

I had a hard drive crash, and need to tell the data recovery company which files to attempt to restore.

I am going to tell them to get everything under /var/www/ which should get all the sites main data. But what about MySQL files?

Thanks

[till]

MySQL data is stored in /var/lib/mysql/