問題：啓動mysql 報錯：
ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)
處理方法：修改/etc/my.conf:
[mysqld]
socket=/var/lib/mysql/mysql.sock 以前是socket=/tmp/mysql.sock
[client]
socket=/var/lib/mysql/mysql.sock 以前是socket=/tmp/mysql.sock
修改後重新啓動mysql服務
service mysqld restart
成功解決問題