Typing ls
Twenty mechanisms, named and linked, between a keystroke and a directory listing on your screen.
Life of a write
Where your data actually is at each moment between write() returning and the bytes reaching the device, and what fsync changes.
Life of a fault
An ordinary first touch of freshly allocated memory, traced from the CPU exception to the instruction re-executing — the normal case, not an error.
Life of a packet
Wire to socket and back again, through the DMA ring, NAPI, GRO, netfilter, routing, and TCP.
Power-on to login
Every handoff between pressing the power button and a login prompt, with the artefact each stage passes to the next.
Life of a container
docker run de-mystified: a container is a process started with unusual arguments, and here is every one of them.