I'm installing a MediaWiki.
The Wiki setup can't connect to the DB (on a remote system. The error is:
Attempting to connect to database server as root...failed with error  Host 'appserver' is not allowed to connect to this MySQL server.
I have run the oft-quoted command:
GRANT ALL PRIVILEGES ON *.* TO root@'mysqlhost' IDENTIFIED BY 'password';
But to no effect. Can anyone advise?