Client or server? From your question, sounds like the server (because that is what phpinfo() returns).
From a client connected to the server, you can run the query select version();.
Else a possibility would be to do a locate (possibly after an update db), use your package manager (no real experience with yum or rpm so something to research yourself) and maybe which.
Note that the server is mysqld, not mysql.
PS No system with mysql/mysqld at hand, so I'm not sure what TB0ne's commands will return. I assume it's the version of mysql, not mysqld.
Last edited by Wim Sturkenboom; 07-24-2010 at 03:35 AM.
Reason: modified PS