Yesterday, we encountered a problem. CentOS 7 reported an error using the yum installation command

yum install unzip zip

yum install unzip zip

Error reporting
Baidu error reporting is probably due to the image problem. To use the alicloud image
modification command, first backup CentOS- Base.repo , rename it

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

Then download the image
centos7:

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

And then you see, there’s a new CentOS- Base.repo
Just clear the yum cache and regenerate it

yum clera
yum makecache

When the cache is regenerated, it will run for a while. When the cache is generated and no error is reported, you can download it using yum