What eBPF actually is, why the verifier means it can't crash your kernel, hooks and maps in plain words, two runnable examples with bpftrace and libbpf, and how Cilium turns all of it into a CNI.
A few GNOME extensions that genuinely improved my Ubuntu desktop experience, from useful clipboard history to ridiculous window-burning animations.
Two Grafana dashboards, same node, same timestamp - one shows 62 GB used, other shows 10 GB. Both are correct. Here's the full story of how Linux memory actually works and which number you should actually be watching.
A complete cheat sheet for the Terminator terminal emulator covering all keyboard shortcuts, broadcast mode, layouts, plugins and launch options.