RedHat7.9 如何配置yum源?
1.查看yum源信息:yum repolist all
2.备份旧的配置文件sudo mv /etc/yum.repos.d/xxxx.repo /etc/yum.repos.d/xxxx.repo.bak
3.下载阿里源的文件sudo wget -O /etc/yum.repos.d/Centos-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
4.修改下载来的配置文件 $ releasever 替换为 7sed s/$releasever/7/g /etc/yum.repos.d/Centos-Base.repo
5.清理缓存yum clean all
6.重新生成缓存yum makecache
7.再次查看yum源信息yum repolist all
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