Here's the obit. And here's Carlin with Johnny Carson over 40 years ago, sporting a very different look. Rather remarkable to look at.
Also worth a look is his famous piece: Seven Dirty Words You Can’t Hear on TV because it formed the basis for a first amendment case that went to the US Supreme Court in the 1970s. Obviously, given the very nature of the content and case, you should know in advance that the video is not exactly "family-friendly" video.