Linux中使用yum安装的时候一直报错：Loaded plugins: 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:

场景：Linux中使用域名安装软件的时候一直报错：

Loaded plugins: 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; Unknown error"

 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 <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
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64

 

解决方法：

# cd /etc/yum.repos.d/
2、 将该目录中的yum资源文件备份走，创建本地资源文件
# vi CentOS-Local.repo
[Centos_local]
name=Centos_local
baseurl=file:///media/dvd/
enabled=1
gpgcheck=1
gpgkey=file:///media/dvd/RPM-GPG-KEY-CentOS-7
保存退出
3、 关闭防火墙
# systemctl stop firewalld.service
# systemctl disable firewalld
4、 关闭SELINUX
# vi /etc/selinux/config
修改
SELINUX=disabled
# setenforce 0
5、 # mkdir -p /media/dvd
6、 # mount -t iso9660 -o loop /home/CentOS-7.2-x86_64-DVD-1511.iso /media/dvd/#mount -t iso9660 -o loop /home/rpm/CentOS-7.2-x86_64-DVD-1511.iso /media/dvd