How to recover grants for root user in mysql

I acciden开发者_开发知识库tally removed all privileges for root user. How can I recover it ?

Check out this part of the MySQL-Documentation, they've dedicated a whole chapter to this: http://dev.mysql.com/doc/refman/5.5/en/resetting-permissions.html

First, start MySQL with --skip-grant-tables Next, run the following query: UPDATE mysql.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', Event_priv = 'Y', Trigger_priv = 'Y', max_questions = 0, max_updates = 0, max_connections = 0, max_user_connections = 0 WHERE user = 'root'

Finally, run FLUSH PRIVILEGES; and restart MySQL

If you need to reset the password as well, follow the instructions in the link above.