1. 安装wgetyum install -y wget2. 备份配置文件mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak3. 下载华为yum源wget -O /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-7-reg.repo4. 清理缓存yum clean all5. 重新生成缓存yum makecache6.如有报错yum makecache Loaded plugins: auto-update-debuginfo, fastestmirror, product-id, search-disabled-repos Repository base is listed more than once in the configuration Repository updates is listed more than once in the configuration Repository extras is listed more than once in the configuration Repository centosplus is listed more than once in the configuration Determining fastest mirrors Could not retrieve mirrorlist http://mirrorlist.centos.org?archx86_64release7reposclo-rh error was 14: curl#6 - Could not resolve host: mirrorlist.centos.org; Name or service not known One of the configured repositories failed (Unknown), and yum doesnt have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work fix this: 1. Contact the upstream for the repository and get them to fix the problem. 2. Reconfigure the baseurl/etc. for the repository, to point to a working upstream. This is most often useful if you are using a newer distribution release than is supported by the repository (and the packages for the previous distribution release still work). 3. Run the command with the repository temporarily disabled yum --disablereporepoid ... 4. Disable the repository permanently, so yum wont use it by default. Yum will then just ignore the repository until you permanently enable it again or use --enablerepo for temporary usage: yum-config-manager --disable repoid or subscription-manager repos --disablerepoid 5. Configure the failing repository to be skipped, if it is unavailable. Note that yum will try to contact the repo. when it runs most commands, so will have to try and fail each time (and thus. yum will be be much slower). If it is a very temporary problem though, this is often a nice compromise: yum-config-manager --save --setoptrepoid.skip_if_unavailabletrue Cannot find a valid baseurl for repo: centos-sclo-rh/x86_64执行sudo yum-config-manager --disable centos-sclo-rh centos-sclo-scloyum makecache6.补充阿里源: http://mirrors.aliyun.com/repo/Centos-7.repo