Install roon on Vortexbox problem

Hi I am trying to install roon on a vortex following instructions from 2017 and its not working.

Trying to use this:
$ curl -O
$ chmod +x
$ sudo ./

Vortexbox does not recognised sudo, i tried doing dnf -y but it says no package./ available, unable to find match

Any ideas on how I can do this? The vortexbox forum seems all but dead.

Sorry please ignore, I tried it again and it worked most odd!