在Linux中配置slave mysql服务器

Question

我做到了：

server-id               = 2
master-host=198.199.100.101
master-connect-retry=60
master-user=root
master-password=mypass
replication-do-db=db_demo
#log_bin                        = /var/log/mysql/mysql-bin.log
#expire_logs_days       = 10
#max_binlog_size         = 100M
#binlog_do_db           = mysql
#binlog_ignore_db       = include_database_name

我保存后，重新启动mysql，但无法启动mysql。如何解决？