进入mysql
mysql -u root -p123456
进入mysql后分别执行以下命令：
MySQL>use mysql;
MySQL>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION ;
MySQL>FLUSH PRIVILEGES;
进入mysql
mysql -u root -p123456
MySQL>use mysql;
MySQL>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION ;
MySQL>FLUSH PRIVILEGES;