backup user in mysql

# /usr/bin/mysql -uroot -p
Enter password:
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Your MySQL connection id is 253404
Server version: 5.1.54-1ubuntu4 (Ubuntu)

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mysql> GRANT LOCK TABLES, SELECT ON *.* TO ‘BACKUPUSER’@’%’ IDENTIFIED BY ‘PASSWORD’;
Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

GRANT ALL PRIVILEGES ON *.* TO ‘backup_user’@’localhost’ IDENTIFIED BY ‘system’;
mysqldump -u backup_user -psystem * > dump.sql