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环境 centos8 docker-ce harbor centos8替换源 1.更换之前确保自己安装wget yum list wget 2.若没有安装： yum -y install wget 3.首先备份原版/etc/yum.repos.d/CentOS-Base.repo cd /etc/yum.repos.d sudo mv CentOS-Base.repo CentOS-Base.repo.bak 4.下载阿里的yum源配置文件，放入/etc/yum.repos.d/Cent