问题随记 —— Cannot find a valid baseurl for repo: base/7/x86_64-繁依Fanyi

问题描述

yum update 时出现以下问题。

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile


 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. Run the command with the repository temporarily disabled
            yum --disablerepo= ...

     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

解决方法

① 修改网卡、DNS等

进入以下目录：

cd /etc/sysconfig/network-scripts

配置 ifcfg-eth0 文件（网卡不同，文件名可能不同），内容如下：

vim ifcfg-eth0

然后再添加 DNS1=8.8.8.8 语句，保存退出。

输入以下命令重启网卡：

service network restart

如果还不行，看下一步

② 更改配置文件

进入以下目录

cd /etc/yum.repos.d/

输入以下命令使失效

mv CentOS-Base.repo CentOS-Base.repo.bak

清楚缓存、生成缓存

# 清除缓存
yum clean all

# 生成缓存
yum makecache

再改回来

mv CentOS-Base.repo.bak CentOS-Base.repo 

yum update 成功