ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

mysql每次启动都会生成一个mysql.sock文件。删除掉mysql.sock文件即可。下次启动会重新创建。