一、nginx的yum安装

1.下载nginx的rpm包：

wget http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm

2.安装rpm包

rpm -ivh nginx-release-centos-7-0.el7.ngx.noarch.rpm

3.安装nginx

yum -y install nginx

4.启动nginx服务并设置开机自启

systemctl start nginx
systemctl enable nginx