Connect to Linux through Groovy

I searched and figured I'll try to bring people to me now.
I seen a lot of code to connect to a HOST and run a ./SH File, but nothing worked.

Here is what I would like for an answer:
> I want to:
1. Connect to a Linux box
2. run /tmp/helloworld.sh
3. have the log.info show it in groovy

Now to take out syntax values that cause confusion, use:
Host = linuxhost.net
User = myname
PW = test123

Thank You Whomever Replies with an Answer!
Rob (Jasper)