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mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;
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# mysql -u root -proot
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'youpassword' WITH GRANT OPTION;
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# mysql -u root -proot
grant select,insert,update,delete on *.* to root@"202.11.10.253" Identified by "dboomysql";
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# mysql -u root -proot
grant all on *.* to root@"202.11.10.253" Identified by "dboomysql"
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