Thank you Kashifali for your suggestion. I did what you said (and indeeed there were some folders inside /opz/zimbra/ that were owned by root:root and others by zimbra:zimbra) but unfortunately when I start zimbra (zmcontrol start) I still get the
I think that mysql server is actually running, but there is something wrong with authentication. If I run:
mysql.server is not running.
and put in password "zimbra", I get
zimbra@mailserver:~$ mysql -u root -p
Walking in dark. Any suggestion or hint is appreciated!
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)