I've installed some apps such as PostgreSQL, TomCat 6 and 8, Ruby, Java, etc, but I can't find them to use. When I go to the end user panel they are not there. I also can't access PhpMyAdmin because I don't know what are the login and password. I looked for my.cnf in webuzo folder, but it does not exist. I can't create databases and users too. It always says "unable to create a database/user".