Don't Rush After Installing Ubuntu 26.04 LTS! Swiftly Configure Domestic Mirrors (Huawei & Alibaba Cloud APT Sources DEB822 Tutorial)

Tue, 26 May 2026 21:00:00 +0800

TL;DR

Ubuntu 26.04 LTS (Resolute Raccoon) has officially been released. If you have just installed it, the very first thing you should do is replace the default APT sources with fast domestic mirror servers (such as Alibaba Cloud or Huawei Cloud). Note that starting from Ubuntu 24.04, the system has transitioned entirely to the new DEB822 format for APT source configurations (stored in /etc/apt/sources.list.d/ubuntu.sources), making the traditional /etc/apt/sources.list inactive by default.

This tutorial provides a step-by-step guide on how to safely change to Alibaba Cloud and Huawei Cloud mirrors in Ubuntu 26.04 LTS, along with deep troubleshooting analysis for potential pitfalls like dependency conflicts and version codename mismatches.

[Clickbait Alert] Switching to a Chinese Mirror Nearly Broke My Ubuntu: A Real Story of apt Dependency Hell

Sun, 17 May 2026 10:00:00 +0800

TL;DR

I switched to a domestic Chinese mirror for Ubuntu and thought it would take 10 minutes. It took two hours. This article documents the entire journey from “mirror sync delay causing version mismatch” to “dpkg forced downgrade” to “apt fully restored.” The core lesson: switching a mirror is not a one-click fix—version consistency is everything. If you swap mirrors on a system that’s been running for months, you have a 99% chance of hitting dependency conflicts.

All operations in this article are based on Ubuntu 26.04 (Plucky). All IPs, hostnames, and paths are sanitized examples and contain no internal network addresses or sensitive information.

Huawei Cloud on Margrop Blog

Don't Rush After Installing Ubuntu 26.04 LTS! Swiftly Configure Domestic Mirrors (Huawei & Alibaba Cloud APT Sources DEB822 Tutorial)

[Clickbait Alert] Switching to a Chinese Mirror Nearly Broke My Ubuntu: A Real Story of apt Dependency Hell