How can you call a system "Linux" if you don't expose system operations in a file-like API? Granted, /dev is a pretty crappy way of doing it, but /proc, /sys a

How can you call a system "Linux" if you don't expose system operations in a file-like API? Granted, /dev is a pretty crappy way of doing it, but /proc, /sys and (bash shim, not actually a file) /dev/tcp are what I believe expected basic functionality of modern "Linux"