Centos7配置yum源

1、查看当前yum源

sudo yum repolist

2、备份原始yum源

cd   /etc/yum.repos.d
cp  CentOS-Base.repo   CentOS-Base.repo-20220705.bak

3、配置CentOS的DNS:

vim   /etc/resolv.conf
nameserver   114.114.114.114      //国内dns
nameserver   8.8.8.8              //国外dns

4、下载yum文件,替代原始yum源:

(1)网易yum源:
            wget -O /etc/yum.repos.d/CentOS-Base.repo    http://mirrors.163.com/.help/CentOS7-Base-163.repo
            yum clean all          //清除缓存
            yum   makecache       //生成缓存
            解析:wget -o,使用“-o”参数来指定一个文件名

(2)阿里云yum源:
            wget   -O   /etc/yum.repos.d/CentOS-Base.repo    http://mirrors.aliyun.com/repo/Centos-7.repo
            yum   clean  all
            yum   makecache

此处可作为参考

https://developer.aliyun.com/mirror/

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