[root@localhost ~]# sudo yum install -y yum-utils
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 on
ly
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 pr
oblem.
2. Reconfigure the baseurl/etc. for the repository, to point to a wor
king
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 defaul
t. 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 unavailab
le.
Note that yum will try to contact the repo. when it runs most comm
ands,
so will have to try and fail each time (and thus. yum will be be m
uch
slower). If it is a very temporary problem though, this is often
a nice
compromise: