WARNING: RT couldn't start up a web server on port 80.
This is often the case if the port is already in use or you're running /opt/rt4/sbin/rt-server.fcgi
as someone other than your system's "root" user. You may also specify a
temporary port with: /opt/rt4/sbin/rt-server.fcgi --port <port>
I though with it using fastcgi that it would not need to start a http listener? can anyone advise.
Can you paste the error in your Apache log /var/log/rt/error_log, if it is an error with some other process running on port 80 do you know what is running on that port if not Apache?
I can’t do that yet, but I can show you what the lsof -i :80 command results in (apparently, that is a way to find out what programs are listening to port 80):
It looks like apache is running on port 80, I would expect you to be able to go to the IP address in your web browser of your server. If you have your apache config set-up correctly then you should hit the web UI.