mysqldump报错-Got error: 1449

mysqldump -uroot -pPasswd DBName >/home/lsf/DB_Backup.sql

报错，显示：

Got error: 1449: The user specified as a definer ('root'@'') does not exist when using LOCK TABLES

或者直接：the user specified as a definer ('root'@'') does not exist

解决办法：

给root用户再添加一个对全部host都有可以访问的权限：

mysql -uroot -pPasswd

mysql >grant all privileges on *.* to root@"%" identified by "Passwd";

mysql >flush privileges;