# service mysqld stop
# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
# mysql -u root mysql
mysql> UPDATE user SET Password=PASSWORD('root') where USER='root';
mysql> FLUSH PRIVILEGES;
mysql> quit
# service mysqld start
# mysql -uroot -p
Enter password: <输入新设的密码root>
mysql>
给某台电脑赋予可以用root连接并管理数据库的权限：
service mysqld stop
mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
mysql -Dmysql
insert into user(host,user,password) values('<机器名/IP>','root','<Password>');
update user set
Select_priv = 'Y',
Insert_priv = 'Y',
Update_priv = 'Y',
Delete_priv = 'Y',
Create_priv = 'Y',
Drop_priv = 'Y',
Reload_priv = 'Y',
Shutdown_priv = 'Y',
Process_priv = 'Y',
File_priv = 'Y',
Grant_priv = 'Y',
References_priv = 'Y',
Index_priv = 'Y',
Alter_priv = 'Y',
Show_db_priv = 'Y',
Super_priv = 'Y',
Create_tmp_table_priv = 'Y',
Lock_tables_priv = 'Y',
Execute_priv = 'Y',
Repl_slave_priv = 'Y',
Repl_client_priv = 'Y',
Create_view_priv = 'Y',
Show_view_priv = 'Y',
Create_routine_priv = 'Y',
Alter_routine_priv = 'Y',
Create_user_priv = 'Y'
where user='root';
flush privileges;
quit;
service mysqld stop
service mysqld start
