Mysql Command line - Red Hat (no replies)

Hi

I have 2 red hat servers version 5.4, one of the servers has the latest MySql installed and the other is where the php scripts are. I didn't set up the installation and the configuration isn't complete. PHP script run through apache will connect to the MySql database however when i try to run the php script to connect to the database it comes up with the following error.

Fatal error: Call to undefined function mysql_connect()

I cannot find where the lib that is needed for the command line scripts to connect is, ie run the function mysql_connect.

Any help will be gratefully received, cheers.