Centos mirroring recommendation

When choosing a CentOS image, you should follow the following steps: Understand different versions: There are mainly 7, 8, and Stream versions, and choose according to your needs. Determine the architecture: the common one is x86_64. If using an ARM server, select arm64. Official mirror: safe and reliable, but slow download speed. Domestic mirroring: fast speed, choose a site with good reputation and timely updates. Verify mirror integrity: Use the checksum tool to verify after downloading.

CentOS mirror recommendation: Don’t be cheated!

When many friends mention CentOS, the word "stable" pops up in their minds, and then dives into the download page, picking a mirror and it's all done. Alas, this is so naive! Mirroring seems simple, but there are many pitfalls behind it. In this article, let’s talk about how to choose a reliable CentOS image to avoid unnecessary troubles. After reading it, you can easily control various CentOS versions and mirror sources like an experienced driver.

First of all, we must understand that CentOS mirroring is not static. It is divided into versions (such as 7, 8, stream), and architecture (x86_64, arm64, etc.). What's more, the source of the mirror varies greatly, some are fast, some are slow, some are safe, some are...well, you know.

Basics: Version and Architecture

CentOS has three main versions: 7, 8 and Stream. The versions are quite different, and the software package and kernel versions are different. Which version to choose depends on your needs. For example, if you need long-term stability, then 7 is still a good choice, but it has stopped maintaining and security updates are a problem. 8 is relatively modern, but it has also reached the end of its life cycle. The Stream version is updated in a rolling manner and is always up to date, but has a slightly lower stability.

The architecture is much simpler. Most people’s servers have x86_64 architecture, so just choose this one. Unless you are using an ARM server, you have to choose arm64.

Official mirror: Security first

The most reliable one is of course the official mirror. Although the download speed may be slower, it is absolutely safe and reliable. You can find the download link on the official CentOS website. I won’t post the link here, just do it yourself and have enough food and clothing. Remember, you must carefully check the checksum when downloading to prevent files from being corrupted during downloading. It's as important as when you buy gold, you have to see the authenticity.

Domestic mirroring: Speed ​​is king

Is the official image download slow? Don’t worry, there are many excellent mirror sites in China, and the download speed is very high. But be careful that when choosing a mirror site, you must choose sites with good reputation and timely updates. Some small sites may have incomplete images or even tampered with, which is extremely risky! Here I recommend a few that I often use and are more reliable (for reference only and do not constitute any suggestions): Alibaba Cloud Mirror, Tsinghua University Mirror, University of Science and Technology Mirror, etc. These sites generally provide multiple versions of mirroring, pay attention to the version number and architecture when selecting.

Experience in trapping: Don't be greedy

For the sake of fast pictures, I downloaded some images on unknown websites, but after downloading, I found that the file was corrupt, or it was simply a virus! That taste is so sour! Therefore, when choosing a mirror, you would rather be slower than be safe and reliable. After the download is completed, be sure to use the checksum tool to verify the integrity of the file, which is absolutely a necessary step!

Code example (Shell script, verify mirror integrity)

 <code class="bash">#!/bin/bash # 下载镜像文件wget -c https://mirrors.tuna.tsinghua.edu.cn/centos/7/isos/x86_64/CentOS-7-x86_64-Minimal-1810.iso # 获取官方提供的SHA256校验和SHA256SUM=$(curl -s https://mirrors.tuna.tsinghua.edu.cn/centos/7/isos/x86_64/CentOS-7-x86_64-Minimal-1810.iso.sha256 | awk '{print $1}') # 计算本地文件的SHA256校验和LOCAL_SHA256SUM=$(sha256sum CentOS-7-x86_64-Minimal-1810.iso | awk '{print $1}') # 比较校验和if [ "$SHA256SUM" == "$LOCAL_SHA256SUM" ]; then echo "镜像完整性验证通过！" else echo "镜像完整性验证失败！请重新下载。" exit 1 fi</code>

This script is just a simple example, and in actual applications, it may need to be adjusted according to the acquisition method of the image file and checksum. Remember, safety comes first! Don’t cause unnecessary trouble to yourself because of your greed for temporary convenience.

Finally, I wish you a smooth download to the appropriate CentOS image and have fun!

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