[lane@localhost ~]$ sudo yum install vim

[sudo] password for lane:

已加載插件：fastestmirror

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; 未知的錯誤"

?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