How to change the source of centos

The purpose of changing the source in CentOS is to accelerate package downloads, by modifying the pointing of baseurl in the source file configuration file (/etc/yum.repos.d/). The specific steps are as follows: Back up the original configuration file: sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak Edit the configuration file (taking CentOS-Base.repo as an example): sudo vim /etc/yum.repos.d/CentOS-Base.repo find the baseurl line and change it to domestic

CentOS source change: Stop being tortured again!

Many friends have complained that CentOS's source is as slow as a snail. It has not been moved for a long time after downloading a package, which is simply crazy. This article will talk about how to change sources gracefully and completely get rid of the trouble of download speed. After reading it, you can not only easily change the source, but also understand the tricks, and you will never have to worry about this mess again!

First of all, you have to know that CentOS uses yum, and this package management tool relies on source files to obtain software packages. Source files are like the address of a huge software supermarket, and the default source usually points to a foreign server, so slow! What we need to do is to change this address to a domestic mirror site.

Basics: Don't be afraid, it's actually very simple

You only need to know the /etc/yum.repos.d/ directory, which stores all yum source configuration files. These files are usually ended with .repo . Don't worry, you don't need to understand any complicated Linux commands, simple text editing is enough.

Core: Change the source, which means changing the configuration file!

Open your /etc/yum.repos.d/ directory and you will see a bunch of .repo files, each corresponding to a source. For example, CentOS-Base.repo , this is the configuration file of the CentOS main source. These files are what we want to modify.

I personally prefer to use Alibaba Cloud's source because it is stable and fast. Of course, you can also choose Tsinghua University, University of Science and Technology of China, etc., search for it yourself, and there are many choices.

Practice: Take Alibaba Cloud as an example and teach you step by step

Back up the original file first. This is a good habit. If you correct it wrong, you can still recover it:

 <code class="bash">sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak</code>

Then, open CentOS-Base.repo with your favorite text editor (vim, nano):

 <code class="bash">sudo vim /etc/yum.repos.d/CentOS-Base.repo</code>

Find the baseurl line and change it to Alibaba Cloud's source address, for example:

 <code>baseurl=http://mirrors.aliyun.com/centos/$releasever/BaseOS/</code>

Don’t forget to change other baseurl to the corresponding addresses of Alibaba Cloud, such as epel source. The complete configuration file may be relatively long. Check it carefully to make sure that all baseurl point to Alibaba Cloud. Save the file and exit the editor.

Test: A moment to witness miracles!

Finally, update the yum cache and see the effect:

 <code class="bash">sudo yum makecache</code>

Then try to install a software package, such as sudo yum install vim , to see if the download speed is much faster!

Advanced Usage: Play with multiple sources

You can also use multiple sources at the same time to improve reliability. Add multiple baseurl to the configuration file, yum will automatically try to download from different sources, and if one source fails, it will try others. It's like finding a few more stores when buying things and you can always find the right one.

Guide to trapping in pits: Avoid unnecessary trouble

• Backup! Backup! Backup! Say important things three times! Be sure to back up before modifying the configuration file to avoid misoperation.
• Check it carefully! When modifying the configuration file, be sure to carefully check each parameter to ensure it is correct. A small error may cause yum to not work properly.
• Choose the right source! Different source speeds and stability are different, so choosing a reliable source is very important. It is recommended to try a few more sources to find the one that suits you best.
• Version matching! Make sure that the source you choose is compatible with your CentOS version. Version mismatch may cause installation failure.

Remember, changing the source is just a small trick, and more importantly, understanding the working principle of yum and the structure of the configuration file. With these masters, you can easily deal with various Linux system management problems! I wish you a successful source change and a flying feeling from now on!

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