I have an old Stealthplug that I would like to use. I haven't used it in a while and don't have any Windows computers to set it up on. I could only find 1 article on the web for setting it up and that was on the Ubuntu forum back in 2012 but didn't provide enough info.

I plug it in, Ubuntu recognizes it and it shows up in the audio settings. I can set it up to act as the sound card and have videos on Youtube play through it. But I cannot get my guitar sounds to go thru it. I installed Jackd and Rakarack. I tried setting Jackd to connect the Stealthplug to Rakarack but still nothing. Does anyone have any tips?

Your post isn't very spartan, and lacking useful information. Apparently it takes a driver in windows.

Try typing 'stealthplug linux' into DDG or some search engine I got a few useful looking hits.

In Linux the driver is automatically taken care of, just plug and play. Evidence of this can be seen by it showing up in the audio settings automatically, and the fact that I could use it as a sound card. I also posted this in LinuxMusicians forum. Someone there pointed out that I needed to change my JackD connection configuration. This fixed the issue.

For anyone else that might happen to need to solve this same issue, in QjackCtl, in Connections, you need to connect your Rakarrack out_1/2 to system playback_1/2 and system capture to Rackarrack in_1/2.