yum修改为阿里的yum源---正在尝试其它镜像To address this issue please refer to the below wiki article

报错,因为国外的yum镜像国内下载不了东西

正在尝试其它镜像。
wget-1.14-18.el7_6.1.x86_64.rp FAILED                                          
http://mirrors.cn99.com/centos/7.7.1908/os/x86_64/Packages/wget-1.14-18.el7_6.1.x86_64.rpm

修改yum为阿里的yum源

yum install wget -y

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

yum makecache

#更新系统软件
yum -y update