yum install nginx

先安装nginx的yum源

http://nginx.org/en/linux_packages.html#stable 找到链接，安装：

rpm -ivh http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm

查看：

yum info nginx

安装：

yum install nginx

service nginx start