ubuntu-knowledge-patch

Installation
SKILL.md

Ubuntu 25.10+ Knowledge Patch

Claude's baseline knowledge covers Ubuntu through 24.04 LTS Noble Numbat. This skill provides changes from 25.10 Questing Quokka (2025-10-09) onwards.

Breaking Changes Quick Reference

What Changed Old New (25.10+)
sudo GNU sudo sudo-rs (Rust); originals renamed .ws
Core utilities GNU coreutils rust-coreutils v0.2.2; GNU as fallback
APT solver Legacy solver New solver default; apt why / apt why-not
wget on server Pre-installed Removed; use wcurl $URL instead
Time daemon systemd-timesyncd Chrony with NTS on port 4460/tcp
OpenSSH 9.x 10.0 — post-quantum key exchange, DSA removed
OpenSSL 3.x 3.5 — ML-KEM, ML-DSA, SLH-DSA; QUIC support
Valkey/Redis compat valkey-redis-compat Removed — swap to Valkey before upgrading
Desktop session X.org + Wayland Wayland-only; X.org session removed
Terminal multiplexers byobu in main, screen in server seed byobu demoted to universe, screen removed
Related skills
Installs
3
GitHub Stars
19
First Seen
Apr 7, 2026