[Tutorial] Updating CentOS 7 Mirror to Aliyun

Published: August 20, 2024 by SingularityKChen (Last updated: August 20, 2024 )

• Categories:
• Tutorial 26

• Tags:
• CentOS 3
• CentOS7 1
• Linux 7

• Problem Description
• Updating the CentOS 7 Mirror
• Explanation

Problem Description

As the CentOS 7 is no longer maintained, the default mirror is not available. We need to update the CentOS 7 mirror to the Aliyun mirror even we pull the official CentOS 7 image from Docker Hub.

Updating the CentOS 7 Mirror

sed -e "s|^mirrorlist=|#mirrorlist=|g" \
    -e "s|^#baseurl=http://mirror.centos.org/centos/\$releasever|baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009|g" \
    -i.bak \
    /etc/yum.repos.d/CentOS-Base.repo

Then run:

yum clean
yum makecache

Explanation

1. The sed command is used to replace the mirrorlist and baseurl in the CentOS 7 repository configuration file with the Aliyun mirror URL.
2. We only replace the CentOS-Base.repo file in the /etc/yum.repos.d/ directory, which is the default repository configuration file for CentOS 7. Other repository configuration files will be updated automatically when we run yum makecache.
3. The yum clean command is used to clean the cache of the old mirror, and the yum makecache command is used to update the cache with the new mirror.