I'm trying to setup two servers like this: Installing A Web, Email & MySQL Database Cluster On Debian 6.0 With ISPConfig 3 with mysql5.5+ from dotnet.org. After stopping mysql service and editing /etc/mysql/my.cnf there is no way to restart MySQL again. Starting MySQL database server: mysqld . . . . . . . . . . . . . . failed! In the log there is something about master-host. after googling: The following options are removed in MySQL 5.5. If you attempt to start mysqld with any of these options in MySQL 5.5, the server aborts with an unknown variable error. –master-host –master-user –master-password –master-port How to setup the servers with Mysql5.5+??????