1.修改vim /etc/yum.repos.d/CentOS-Base.repo ,把http协议修改为https
2. cat /etc/redhat-release 查询CentOS版本安装对应版本的epel
CentOS7使用yum需要安装epel
epel安装
sudo yum install -y epel-release
stress安装
sudo yum install -y stress
查询
yum list installed|grep epel
最后输入:stress --version 验证是否安装成功
若epel安装错误,卸载
yum remove epel-release.noarch