本文主要是介绍一行指令解决CentOS yum无法使用的问题，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
由于CentOS7官方再2024年6月30日结束支持导致的yum无法使用的问题
报错信息：
Eclips3@VM-8-7-centos ~]$ sudo yum install wget
Loaded plugins: fastestmirror, langpacks
Repository centos-sclo-rh is listed more than once in the configuration
Repository epel is listed more than once in the configuration
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org?arch=x86_64&release=7&repo=sclo-rh error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"One of the configured repositories failed (Unknown),and yum doesn't have enough cached data to continue. At this point the onlysafe 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 workingupstream. This is most often useful if you are using a newerdistribution release than is supported by the repository (and thepackages for the previous distribution release still work).3. Run the command with the repository temporarily disabledyum --disablerepo=<repoid> ...4. Disable the repository permanently, so yum won't use it by default. Yumwill then just ignore the repository until you permanently enable itagain or use --enablerepo for temporary usage:yum-config-manager --disable <repoid>orsubscription-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 muchslower). If it is a very temporary problem though, this is often a nicecompromise:yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=trueCannot find a valid baseurl for repo: centos-sclo-rh/x86_64在用这个方法之前，我也自己手动配置了镜像源的url和path，结果都是不行。
此时先输入命令yum repolist查看仓库状态，可以看到status和repolist为0，这里是因为我以及重新配置镜像了，所以可用仓库不为0
在命令行输入这条指令
作者的gitee链接：LinuxMirrors: GNU/Linux 一键更换系统软件源脚本
使用方法链接：使用方法 - LinuxMirrors
bash <(curl -sSL https://linuxmirrors.cn/main.sh)然后选择想要安装的镜像源，一路输入y就行了
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