Centos 7 无法使用yum命令解决方法

  • 前言

在刚安装完Centos系统的时候可能会出现yum命令无法使用的情况,情况如下

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

设置网卡开机启动

针对这个问题首先要确认网卡是否已经启动了,CentOS7最开始安装完的时候网卡可能会是关闭的,需要自己自行开启

cd /etc/sysconfig/network-scripts #进入网卡配置目录
ls -al #列出所有文件

如果这个时候你能看到类似于: ifcfg-ens01 ..... 之类的文件,那么就修改第一个文件(仅限于单个网卡),多个网卡需要推算一下

找到

ONBOOT=no

的字段

把no改为 yes , :wq! 退出

然后执行

service network restart #重启网卡

然后再继续执行你要执行的命令即可


⚠️注意,如果以上方法不能解决

vim /etc/yum.repos.d/CentOS-Base.repo #如果提示未找到vim , 则使用 vi

将所有的“mirrorlist”注释掉

将所有的“baseurl”取消注释

:wq 保存后使用 reboot 命令重启服务器即可

最后修改:2021 年 04 月 08 日 07 : 04 PM
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