Looking for a small database testing application

I keep getting an error when I try to run a redmine installation.

This is what comes up.

.gems/gems/activerecord-2.3.5/lib/active_record/connection_adapters/
mysql_adapter.rb:589:in `real_connect': Can't connect to local MySQL
server through socket '/var/run/mysqld/mysqld.sock' (2) (Mysql::Error)

The database server is a remote server, and I can't see why
activerecord is complaining about the absence of a local socket.

The part of the installation to initialize the database went fine.

Is there a small test app I can use to check if the database
connectivity part is working properly? Something read a row or test
the existings of some tables?

I keep getting an error when I try to run a redmine installation.

This is what comes up.

.gems/gems/activerecord-2.3.5/lib/active_record/connection_adapters/
mysql_adapter.rb:589:in `real_connect': Can't connect to local MySQL
server through socket '/var/run/mysqld/mysqld.sock' (2) (Mysql::Error)

The database server is a remote server, and I can't see why
activerecord is complaining about the absence of a local socket.

Probably because the app hasn't been configured to look for that
remote server, so it's defaulting to the local machine.

Fred