Aliyun on Margrop Blog

[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.

How to Configure a Freshly Installed Ubuntu 20.04 Server VM on PVE

Sat, 30 Jan 2021 15:33:44 +0800

Download the Installation ISO

Aliyun Ubuntu 20.04 live server download Aliyun Ubuntu 18.04 live server download

Upgrading or Fresh Installing MariaDB 10.5 on CentOS 7 Using Aliyun Mirror

Fri, 29 Jan 2021 15:42:20 +0800

Update the System First

yum update -y

Edit the yum Configuration File Using Aliyun Mirror

Here MariaDB 10.5 is used as an example

vim /etc/yum.repos.d/MariaDB10.repo

#http://downloads.mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = https://mirrors.aliyun.com/mariadb/yum/10.5/centos7-amd64
gpgkey = https://mirrors.aliyun.com/mariadb/yum/RPM-GPG-KEY-MariaDB
gpgcheck = 1

Installing Docker on CentOS 7 and Configuring Aliyun Mirror Source

Fri, 29 Jan 2021 11:40:18 +0800

Docker Version

Since Docker version 1.13, Docker has adopted a timeline-based versioning approach, dividing releases into Community Edition (CE) and Enterprise Edition (EE). Docker CE is the free community edition, while Docker EE is the paid enterprise version.