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Most Linux users have typed sudo ten thousand times. Almost none can explain what the kernel is doing when those ten characters are hit. This article walks through the whole chain — setuid, the dynamic linker scrubbing your env, PAM authentication, the difference between su and su -, why sudo keeps a 5-minute grace, and... » read more

Teredo was supposed to be the way to give every IPv4-only user behind a NAT box a globally routable IPv6 address. In 2026 it’s basically a museum piece — Microsoft ships it disabled by default, public Teredo servers have all but disappeared, and Linux support is gone. This article explains what Teredo was, how it... » read more

Arch is the smallest of the major RISC-V Linux distributions, but it’s the most up-to-date — and the one rolling-release enthusiasts who want their RISC-V box to feel like mainline Arch are running in 2026. This article covers what’s officially supported, what works in practice, and what doesn’t. The short version: Arch RISC-V is a... » read more