root@sigma [/var/www/html]# sudo -u mysql mysqld
070603 19:43:46 [Warning] Changed limits: max_open_files: 1024  max_connections: 200  table_cache: 407
070603 19:43:46 [ERROR] Can't start server : Bind on unix socket: Permission denied
070603 19:43:46 [ERROR] Do you already have another mysqld server running on socket: /var/lib/mysql.sock ?
070603 19:43:46 [ERROR] Aborting

070603 19:43:46 [Note] mysqld: Shutdown complete