已解决：Could not resolve host: mirrorlist.centos.org; No address associated with hostname

最近, 我试图在Linux环境中安装Apache Web服务器, 并收到以下错误。

[[email protected] ~]# yum install httpd 
Loaded plugins: fastestmirror, langpacks Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os 
error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; No address associated with hostname" 
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:

Contact the upstream for the repository and get them to fix the problem.
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).
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 <repoid>
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 
[[email protected] ~]#

当服务器由于无法解析服务器名称而无法连接到Internet时, 通常会发生这种情况。

解答

看一下/etc/resolv.conf文件。我有以下

; generated by /usr/sbin/dhclient-script
search localdomain
nameserver 8.8.8.8

将”搜索localdomain”保留在底部, 如下所示

; generated by /usr/sbin/dhclient-script
nameserver 8.8.8.8
search localdomain

保存文件并尝试执行.yum对我来说都很好。

注意：名称服务器可能与上面的示例所示不同。这里的重点是将localhost保留在底部, 并且应该移动。

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