Mysqldump backup error: too many errors have been found too many strange # mysql50 #. Mozilla Database

Test the MySQL automatic backup function today.
Mysql_5.5 is installed in red_hat_linux5.
An error occurred while executing the script,
Manually execute the script,
Returned error: mysqldump: Got error: 1102: Incorrect database name' # mysql50 #. Mozilla 'when selecting the database
Log on to MySQL and run the following command:

How is this pseudo database generated? (Solution)
An invisible. Mozilla empty directory is automatically generated under the MySQL data directory/var/lib/MySQL. The database engine regards it as a database.
How can I delete this pseudo database? (Solution)
Find/var/lib/MySQL-iregex ". Mozilla" | xargs Rm-RF
Why is the. Mozilla directory generated? (To be resolved)