Thanks for the feedback! Glad to hear you got it working.
In the instructions I did put the prompt as "#" instead of "$" which traditionally means root, but perhaps that's too subtle. Anyone who knows that will also know that you don't have to use sudo so I will change the instructions to include sudo.
I didn't want to include a "&" to make slattach run in the background (there is a note on the page that says it won't return) because while slattach is running the serial port is locked, which means you won't be able to upload any new sketches. Rather than explain how to resume tasks and/or kill them, I figured running it in a different terminal and pressing Ctrl+C was easiest.