[savagez]

Should probably explain what issues you’re running into for anyone to be able to actually help you out.

cam@dumdum:~/Downloads$ sudo ./RSU-linux-x64-installer.run
[sudo] password for cam:
sudo: ./RSU-linux-x64-installer.run: command not found

cam@dumdum:~$  sudo apt-get install oracle-java8-installer
Reading package lists... Done
Building dependency tree     
Reading state information... Done
Package oracle-java8-installer is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Tutorial - RuneMate on Linux
Maybe this can help you?

Thanks very much.