原文博客：http://www.cnblogs.com/Fly-Wind/p/5019452.html
错误：Can ‘t connect to local MySQL server through socket ‘/tmp/mysql.sock ‘(2) ";
mysql -u root -h 172.0.0.1 -p
/usr/local/mysql/bin/mysqladmin -u root -h 172.0.0.1 -p shutdown
此时/tmp/下已经有mysql.sock，可以正常启动
原文：http://www.cnblogs.com/wangchaowei/p/7482174.html