Take the 2-minute tour ×
Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. It's 100% free, no registration required.

I am investigating a web site server (CentOS release 6.3) that runs the traditional lamp stack;

I am getting the following output my MySQL;

mysql> show databases;
| Database           |
| information_schema |
| #mysql50#.config   |
| webtestdb          |
| mysql              |
| test               |
| websitedb          |
6 rows in set (0.00 sec)

What is "#mysql50#.config"? Also, I can't select it;

mysql> use #mysql50#.config;
    -> ;
USE must be followed by a database name
mysql> use \#mysql50\#.config;
No connection. Trying to reconnect...
Connection id:    1707
Current database: *** NONE ***

ERROR 1049 (42000): Unknown database 'mysql50.config'
mysql> use `#mysql50\#.config`;
ERROR 1102 (42000): Incorrect database name '#mysql50#.config'

Does this resemble some sort of crashed database, or a temporary database from a previous import or export than has been left behind by mistake?

mysql> SHOW VARIABLES LIKE "%version%";
| Variable_name           | Value               |
| protocol_version        | 10                  |
| version                 | 5.1.67-log          |
| version_comment         | Source distribution |
| version_compile_machine | x86_64              |
| version_compile_os      | redhat-linux-gnu    |
5 rows in set (0.00 sec)
share|improve this question
add comment

2 Answers

up vote 1 down vote accepted

This is nothing but a folder/file in database directory.

The default location for data directory is /var/lib/mysql on ubuntu.Go to that location(datadir) and find what is there in that folder if it not your database please move that to some another place.

If you need to find the location of data directory issue command on MySQL shell

| Variable_name | Value           |
| datadir       | /db-data/mysql/ |
1 row in set (0.00 sec)

Which will give you the location of data directory

share|improve this answer
add comment

OK, so it seems that his has occurred because someone has left some files (one called conf) in the MySQL user's home directory. Removing them has removed this weird database.

share|improve this answer
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.