Help with DUMPVDL2 install

I have DUMPVDL2 installed on my second pi and it runs great from the command line but I want it to run from boot. Here in the instructions you can run from boot but I am a noob with Linux. Can someone simplify this for me?
I am running stretch.

Launching dumpvdl2 in background on system boot

Please help and thanks in advance.

Glenn