centos7无法使用yum命令，如何解决？

Question

哥 我在vmware上下载的centos7系统不能使用yum命令下载东西怎么办
我输入的是sudo yum -y install gcc 他下面就给我弹出来一长串这个

Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
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. Run the command with the repository temporarily disabled
        yum --disablerepo=<repoid> ...

 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

Answer 1

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解决 CentOS7 无法使用 yum 命令的问题

你遇到的问题可能是由于 yum 仓库配置问题或网络连接问题导致的。下面是一些可能的解决方案：

1. 检查 yum 仓库配置：输入 sudo yum repolist 命令，检查是否有可用的 yum 仓库。如果没有可用的仓库，可以尝试添加仓库。例如：

sudo yum install epel-release

1. 检查网络连接：输入 ping google.com 命令，检查网络是否可用。如果网络不可用，可以尝试检查网络连接或重新启动网络服务。
2. 检查 yum 配置文件：输入 sudo cat /etc/yum.conf 命令，检查 yum 配置文件是否正确。如果配置文件有问题，可以尝试重新配置。
3. 尝试使用 yum-cron：输入 sudo yum-cron 命令，检查是否可以使用 yum-cron 工具。如果可以，可能是 yum 服务的问题，可以尝试重新启动 yum 服务。
4. 重新安装 yum：如果以上方法都不能解决问题，可以尝试重新安装 yum。输入 sudo yum install yum 命令，重新安装 yum。

如果你遇到的问题仍然无法解决，可以提供更多的日志信息或错误信息，以便更好地帮助你解决问题。