Centos7.9 安装utils或vim包出现“Could not resolve host: mirrorlist.centos.org； 未知的错误“

当执行sudo yum --disablerepo=base install -y yum - utils命令出现一下错误

解决方案：

（1）.进入/etc/yum.repos.d/目录修改默认的镜像源地址

（2）.备份centos镜像源sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

（3）.删除原有的镜像源rm -f CentOS-Base.repo

（4）.使用vi CentOS-Base.repo命令，将阿里的镜像源粘贴进去

# CentOS-Base.repo

#

# The mirror system uses the connecting IP address of the client and the

# update status of each mirror to pick mirrors that are updated to and

# geographically close to the client. You should use this for CentOS updates

# unless you are manually picking other mirrors.

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