我要评论解决yum安装工具时提示以下错误信息
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
1、首先确保虚拟机网络畅通
2、备份系统自带yum源配置文件
mv /etc/yum.repos.d/centos-base.repo /etc/yum.repos.d/centos-base.repo.back
3、通过curl下载yum源
curl -o /etc/yum.repos.d/centos-base.repo http://mirrors.aliyun.com/repo/centos-7.repo
4、运行yum makecache生成缓存
yum makecache
5、更新yum源，等待完成即可使用yum下载命令
yum -y update
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持代码网。
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