How to start MySQL server from command line on Mac OS Lion?

I installed mySQL on my Mac. Beside starting the SQL server with mySQL.prefPane tool installed in System Preferences, I want to know the instructions to start from command-line. I do as follows: After > su root I start the mySQL server by command-line, but it produces an error as below: > **sh-3.2#** /usr/local/mysql/bin/mysqld > > **111028 16:57:43** [Warning] Setting lower_case_table_names=2 because > file system for /usr/local/mysql-5.5.17-osx10.6-x86_64/data/ is case > insensitive > > **111028 16:57:43** [ERROR] Fatal error: Please read "Security" section of > the manual to find out how to run mysqld as root! > > **111028 16:57:43** [ERROR] Aborting > > **111028 16:57:43** [Note] /usr/local/mysql/bin/mysqld: Shutdown complete