In the walk through for the Oopsie machine it was required to change the port and ip values of the php-reverse-shell.php file to match the ones in the settings.
The ip was 127.0.0.1 and the port is 8080. I attempted to edit this with vi and nano, but it would not allow me to save my progress. The ip was 127.0.0.1 by default, but the default port was 1234. Can someone explain to me how to do this another way? The walk through wasn’t clear.