ERROR : Failed to run remote script, stdout: no package provides yum-utils Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=storage-ceph-nautilus error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error" stderr: Warning: Permanently added '192.168.200.10' (ECDSA) to the list of known hosts. + trap t ERR + rpm -q --whatprovides yum-utils + yum install -y yum-utils One of the configured repositories failed (Unknown), and yum doesn't 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 --disablerepo=<repoid> ... 4. Disable the repository permanently, so yum won't 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 --disable=<repoid> 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 --setopt=<repoid>.skip_if_unavailable=true Cannot find a valid baseurl for repo: centos-ceph-nautilus/7/x86_64 ++ t ++ exit 1

<think>好的，我现在需要帮助用户解决在CentOS7系统中遇到的yum安装问题，具体是yum-utils安装失败，以及无法解析mirrorlist.centos.org的问题，错误提示是curl#6。首先，我得分析可能的原因。用户提到无法解析mirrorlist.centos.org，这通常意味着DNS配置有问题。CentOS使用yum时，需要能够解析镜像站点的域名，如果DNS设置不正确，或者网络连接有问题，就会导致解析失败。可能的解决方案包括检查网络连接、DNS配置，或者临时修改yum的配置文件，使用具体的baseurl代替mirrorlist。 接下来是安装yum-utils失败的问题。yum-utils包含一些有用的工具，比如yum-config-manager，如果无法安装，可能会影响后续的软件管理。这可能是因为yum源本身无法访问，或者仓库配置有误。可能需要更换为国内的镜像源，比如阿里云或清华大学的源，这样可以提高下载速度和可靠性。 我需要考虑用户可能已经尝试过默认的yum源，但由于网络问题无法连接。因此，建议用户更换镜像源，并确保DNS设置正确。另外，如果yum缓存有问题，可能需要清理缓存再试。还有，检查防火墙和SELinux是否阻止了网络访问，虽然这个可能性较低，但也不能排除。另外，用户之前的问题中提到了添加Kubernetes和Docker的仓库，可能需要检查这些仓库是否影响了默认的yum源配置，但根据用户当前的错误，主要问题还是在CentOS的基础源上。现在，我需要一步步写出解决方案，首先处理DNS问题，然后更换yum源，接着安装yum-utils。同时，要确保命令正确，并且用户能够顺利执行。可能还需要指导用户如何测试网络连接，比如使用ping或nslookup命令。 最后，生成相关问题，帮助用户深入理解和解决类似的问题，比如更换其他镜像源，或者处理其他依赖安装失败的情况。</think>### CentOS 7 yum问题解决方案 #### 问题1: mirrorlist.centos.org无法解析 **原因分析** DNS解析失败通常由网络配置错误、DNS服务器不可用或镜像站域名被防火墙拦截引起，错误代码`curl#6`表示域名解析失败[^1]。 **解决步骤** 1. **检查网络连通性** ```bash ping 8.8.8.8 # 测试基础网络 nslookup mirrorlist.centos.org # 测试DNS解析 ``` 2. **临时修改DNS配置** 编辑`/etc/resolv.conf`，添加可靠的DNS服务器： ```bash nameserver 8.8.8.8 # Google DNS nameserver 114.114.114.114 # 国内DNS ``` 3. **强制使用基础镜像站** 修改`/etc/yum.repos.d/CentOS-Base.repo`，将`mirrorlist=`行注释，启用`baseurl=`： ```bash sudo sed -i 's/mirrorlist/#mirrorlist/g; s/#baseurl/baseurl/g' /etc/yum.repos.d/CentOS-Base.repo sudo sed -i 's|baseurl=http://mirror.centos.org|baseurl=https://mirrors.aliyun.com|g' /etc/yum.repos.d/CentOS-Base.repo ``` --- #### 问题2: yum-utils安装失败 **原因分析** 该问题通常由仓库元数据损坏、镜像站不可达或软件包依赖冲突引起[^2]。 **解决步骤** 1. **清理yum缓存** ```bash sudo yum clean all sudo rm -rf /var/cache/yum ``` 2. **使用阿里云镜像加速** 替换为阿里云CentOS仓库： ```bash sudo curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo ``` 3. **重试安装** ```bash sudo yum install -y yum-utils ``` --- #### 验证方案 ```bash yum repolist # 检查仓库列表 yum-config-manager --help # 验证yum-utils是否安装成功 ``` ---