ERROR 1044 (42000): Access denied for user "@ ' localhost ' to database ' MySQL '

Tips:ERROR1044(42000):Accessdenied forUser' @ ' localhost ' to database ' MySQL '. There was this problem two days ago.,Online Find a more popular method (see method I),It's done. I tried it again today.,But I can't.,On the internet for half a day,Finally found out because the MySQL databaseUserTable,An account with an empty user name is an anonymous account,Cause login is the use of root,But it's actually logged on anonymously.,You can tell by the error message "@ ' localhost.",So the solution is shown in method two.

Method One:
1. Turn off MySQL
# Service Mysqld Stop
2. Blocking permissions
# Mysqld_safe--skip-grant-table
Screen appears:Starting demo from .....
3. Start a new terminal input
# mysql-u Root MySQL
Mysql> UPDATEUser set password=password (' NewPassword ') where   USER = ' root ';
   mysql> FLUSH privileges;//Remember this sentence , otherwise if you close the previous terminal , will appear the original error
   mysql> \q

Method Two :
1. Turn off MySQL
   # service mysqld Stop
2. Blocking permissions
   # mysqld_safe--skip-grant-table
   screen appears :  starting demo from .....
3. Start a new terminal input
   # mysql-u root mysql
   mysql> delete From  user  where  USER = ';
   mysql> FLUSH privileges;//Remember this sentence , otherwise if you close the previous terminal , will appear the original error
   mysql> \q

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ERROR 1044 (42000): Access denied for user "@ ' localhost ' to database ' MySQL '