問題通常是在使用yum時候出現如下類似的錯誤內容?
Loaded plugins: fastestmirror, langpacks
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
12: Timeout on http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock: (28, 'Resolving timed out after 30383 milliseconds')
?
?
?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. Disable the repository, 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
?
? ? ?4. 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=
?
Cannot find a valid baseurl for repo: base/7/x86_64
這種情況通常是，是因為沒有配置DNS服務器。愛掏網 - it200.com
解決方法：用VI編輯resolv.conf文件
命令
vi /etc/resolv.conf
添加：
nameserver 114.114.114.114 ? ?國內的
wq
保存退出即可