Centos8 yum install出现“为 repo ‘AppStream’ 下载元数据失败”解决方法

只需修改以下4个文件即可解决

1、vim /etc/yum.repos.d/CentOS-Base.repo

# CentOS-Base.repo
[BaseOS]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/BaseOS/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

2、vim /etc/yum.repos.d/CentOS-AppStream.repo

# CentOS-AppStream.repo
[AppStream]
name=CentOS-$releasever - AppStream
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/AppStream/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

3、vim /etc/yum.repos.d/CentOS-Extras.repo

# CentOS-Extras.repo
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/extras/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/extras/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

4、vim /etc/yum.repos.d/CentOS-PowerTools.repo

# CentOS-PowerTools.repo
[PowerTools]
name=CentOS-$releasever - PowerTools
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=PowerTools&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/PowerTools/$basearch/os/
baseurl=https://mirrors.aliyun.com/centos/$releasever-stream/PowerTools/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

修改之后清缓存,制作元数据缓存

# 清除所有缓存文件
yum clean all

# 制作元数据缓存
yum makecache

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