Ubuntu下安装nginx，直接apt-get install nginx就行了，很方便。
但是今天装了CentOS6.2，直接yum install nginx不行，要先处理下源，下面是安装完整流程，也十分简单：
1、CentOS 6，先执行：
rpm -ivh http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm
2，查看yum的nginx信息
[]# yum info nginx
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirror.esocc.com
* extras: mirror.esocc.com
* updates: mirror.esocc.com
base | 3.7 kB 00:00
base/primary_db | 4.4 MB 00:28
extras | 3.5 kB 00:00
extras/primary_db | 19 kB 00:00
nginx | 2.9 kB 00:00
nginx/primary_db | 22 kB 00:00
updates | 3.5 kB 00:00
updates/primary_db | 2.1 MB 00:10
Installed Packages
Name : nginx
Arch : x86_64
Version : 1.4.0
Release : 1.el6.ngx
Size : 874 k
Repo : installed
From repo : nginx
Summary : nginx is a high performance web server
URL : http://nginx.org/
License : 2-clause BSD-like license
Description : nginx [engine x] is an HTTP and reverse proxy server, as well as
: a mail proxy server
3，安装并启动nignx
[root@server ~]# yum install nginx
[root@server ~]# service nginx start
Starting nginx: [ OK ]
4，然后进入浏览器，输入http://139.129.224.242/测试，如果看到
恭喜你，你成功了！
如果不能连接到nginx，原因很多，但是可以先检查 1,nginx服务是否真的起来了；2,linux服务器防火墙是否打开