# How do I fix the "Unknown Host" error when connecting to MySQL?

An `Unknown Host` error like the following occurs when you use the wrong DNS hostname or there are underlying problems with the DNS resolution:

```
ERROR 2005 (HY000): Unknown MySQL server host 'myqsl--do-user-example-0.db.ondigitalocean.com' (0)
```

If you are getting this error, first verify that you are using the correct hostname to connect by following [How to Connect to MySQL Database Clusters](https://docs.digitalocean.com/products/databases/mysql/how-to/connect/index.html.md). Then, verify whether the machine you’re connecting from has problems with DNS resolution by following [Why does my domain fail to resolve?](https://docs.digitalocean.com/support/why-does-my-domain-fail-to-resolve/index.html.md)

## Related Topics

[How do I fix the mysqldump "Couldn't execute FLUSH TABLES Access denied" error?](https://docs.digitalocean.com/support/how-do-i-fix-the-mysqldump-couldnt-execute-flush-tables-access-denied-error/index.html.md): Update backup user permissions, remove the –single-transaction flag, or downgrade mysqldump.

[Why does MySQL shut down when importing data with the source command?](https://docs.digitalocean.com/support/why-does-mysql-shut-down-when-importing-data-with-the-source-command/index.html.md): Use MySQL’s import command instead of source for handling large data imports.

[How do I fix the "1227" error?](https://docs.digitalocean.com/support/how-do-i-fix-the-1227-error/index.html.md): Remove or replace the DEFINER in the dump file.