As a sort of tribute to my late Grandfather I've been ripping his CDs. I found a three disc set of The Essential Johnny Cash ('55-'83) and have been slowly listening to it.
I haven't yet come upon the few Cash songs I know. But I did discover Rock Island Line which is entertaining. We have a former Rock Island line running through our 'burb as a rails-to-trails conversion. Rock Island it's the road to ride.