SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

 

这个 问题产生是因为修改my.cnf,重启服务造成的，一般没有影响。可以不用处理。