CentOS7 yum安装显示错误,更换yum源

1、国内源bash (curl |sSL https://gitee.com/SuperManito/LinuxMirrors/raw/main/ChangeMirrors.sh)#推荐用一2、国内bash (curl |sSL https://linuxmirrors.cn/main.sh)国内教育网bash (curl |sSL https://linuxmirrors.cn/main.sh) ||edu 国外区域bash (curl |sSL https://linuxmirrors.cn/main.sh) ||abroad 2、手工更换

CentOS7更换镜像源
1、先安装wget

yum install |y wget
2、打开阿里镜像http://mirrors.aliyun.com/

点击，帮助，查询详细情况：
3、下载CentOS 7的对应的repo文件

wget |O /etc/yum.repos.d/CentOS|base.repo http://mirrors.aliyun.com/repo/Centos|7.repo
#或者
curl |o /etc/yum.repos.d/CentOS|base.repo http://mirrors.aliyun.com/repo/Centos|7.repo
4、更新镜像源

yum clean all

yum makecache

yum |y update

实行完上面三行命令就好了