resources for learning about named pipes, specifically,

but am also interested in a lot of other unix-related guides/tutorials/examples. there's probably a lot of basic commands that can be a lot more powerfully utilized than I currently imagine. I'm just rekindling an interest in linux, finding myself with a lot of free time these days. I've just started going through a tcl/tk tutorial, which is great so far!

but this is the first I've ever heard about named pipes, and it seems like they could have a lot of varied uses. thanks for any response to this incredibly vague inquiry!