CentOS7을 초기설치 후 한번은 전체 업데이트를 해준다.
이럴 때 yum update 명령을 치면 아래와 같이 메시지가 나와 당황할때가 있다.
One of the configured repositories failed (Inconnu),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 <repoid>
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
yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true
Cannot find a valid baseurl for repo: base/7/x86_64
: 아래와 같이 명령어를 한번만 입력하고 다시 yum update를 하면 정상적으로 처리된다.
잠깐 설명하면 아래와 같이 입력하면 자동으로 알아서 DNS를 설정해주는 명령어이다.