问题描述：Invalid argument: cannot open transport registration socketpair could not read ok from ADB Server failed to start daemon * error: cannot connect to daemon
修改配置后MySQL启动不了，报错：
[root@localhost mysql]# service mysql restart
Starting MySQL...[ERROR] The server quit without updating PID file (/usr/local/mysql/data/mysqld.pid).
看见这个不要惊慌，先把刚才修改的配置注释掉，看是不是配置有误！大部分是手误造成。
