1.添加源，centos7默认可能没有nginx源
sudo rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
2.查看是否添加成功
yum search nginx
3.安装
yum install -y nginx
4.启动
systemctl status nginx.service
systemctl start nginx.service
systemctl stop nginx.service
参考文章：