Centos 7报错curl#6 - "Could not resolve host: mirrorlist.centos.org; 未知的错误"

[root@localhost yum.repos.d]# yum install wget
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; 未知的错误"


 One of the configured repositories failed (未知),
 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: base/7/x86_64

错误原因

2024年6月30日，CentOS 7正式结束生命周期（EOL），官方停止维护支持。因此使用yum安装软件包时会抛出以下错误：

curl#6 - "Could not resolve host: mirrorlist.centos.org; 未知的错误"

解决方法

使用第三方镜像源，例如国内腾讯、阿里等，以下命令使用阿里源

输入以下命令后可正常使用yum安装软件包

# 进入仓库配置目录
cd /etc/yum.repos.d/
 
# 备份原有配置
sudo mkdir backup && sudo mv CentOS-* backup/
 
# 下载配置
sudo curl -O http://mirrors.aliyun.com/repo/Centos-7.repo
 
# 重建缓存
sudo yum clean all && sudo yum makecache