"Everything is a file" is one of the most misunderstood concepts I encountered, to the point where people think that disk IO is involved. A file doesn't even ne

"Everything is a file" is one of the most misunderstood concepts I encountered, to the point where people think that disk IO is involved. A file doesn't even need a filename (eg sockets). The main point is to have a common interface for system resources, which happens to be the file api in Linux. Think of it as the base class of everything. There is a bunch of tools/code that operates on file descriptors, which you can reuse now. Build better interfaces on top of that if you want to.