Christian Lehnert — Linux, Hacking & Faith
popular tags: #linux #psychology #faith #selfhosted #homelab #tip-of-the-week
// tip of the week 2026-07-08
perf Beyond top - Profiling CPU, Memory, and I/O Properly

top tells you a process is busy. It does not tell you why. The perf toolchain, plus a handful of eBPF-based tools, answer the why at the level of functions, cache misses, and individual block-device latencies. This is the advanced layer, for when the basic tools have already told you which process to look at.

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2026-07-09 Ubuntu Touch Convergence - The Fairphone as a Desktop
2026-07-08 TIP perf Beyond top - Profiling CPU, Memory, and I/O Properly
2026-07-07 bcachefs - The Best Filesystem Design That the Kernel Threw Out
2026-07-04 Ubuntu Touch on a Fairphone 4
2026-07-03 TIP ip -br - The Clean Way to Read Interface State
2026-07-02 Non-Human Identity - The Larger Half of the Identity Problem Nobody Manages
2026-06-30 Neko - The Self-Hosted Browser-in-a-Container That Earns Its Place
2026-06-27 tank-os-with-llms - The Hardened Container I Run Claude Code and Gemini CLI In
2026-06-25 halt vs shutdown - The Case for the Simpler Command
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