Drop database return “Error dropping database errno: 66” in MySQL

Question

Consider:

DROP DATABASE db_name;
ERROR 1010 (HY000): Error dropping database (can\'t rmdir \'./db_name\', errno: 66)

The problem is that I

Answer 1

mysql> drop database DB_NAME; 
ERROR 1010 (HY000): Error dropping database 
(can't rmdir './DB_NAME', errno: 66)

1. Find the database directory: mysql -e "select @@datadir" -> /usr/local/mysql/data/

2. Go to the DataBase folder: cd /usr/local/mysql/data/

3. Delete DB folder of the DB with the issue (in this case: sudo rm -rf DB_NAME)