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、运行并安装源：
CentOS 7 下使用这个命令
rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
CentOS 6 下使用这个命令
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nignx
[root@server ~]# yum install nginx
4，启动nginx
CentOS 7 下使用这个命令：
systemctl start nginx
CentOS 6 下使用这个命令
service nginx start
4，然后进入浏览器，输入http://xxxxxxx/测试，如果看到
Welcome to nginx!
If you see this page, the nginx web server is successfully installed and working. Further configuration is required.
For online documentation and support please refer to nginx.org.
Commercial support is available at nginx.com.
Thank you for using nginx.
恭喜你，你成功了！
5、设置为开机启动
CentOS 7 下使用这个命令
systemctl enable nginx.service
CentOS 6下使用这个命令
chkconfig nginx on