Topic index / 03 notes
shell
Visual explanations connected by this systems boundary.
01
What happens when you press Enter?
Follow ls -la from a terminal keystroke through shell parsing, command lookup, process replacement, filesystem calls, and pixels on screen.
02
Linux permissions, visualized as operations
Stop memorizing 755. Read owner, group, and other permissions as answers to concrete file and directory operations.
03
What a pipe actually does
Replace the punctuation model of `|` with connected processes, file descriptors, bounded kernel buffers, and backpressure.