linux上安装ngnix
1.下载ngnix
nginx下载地址：https://nginx.org/download/
当前最新版本是nginx-1.9.9.tar.gz，下载后移动到/usr/local目录上
2.其他环境准备：
安装nginx需要确认系统中安装了gcc、pcre-devel、zlib-devel、openssl-devel。
Linux下检查是否安装过某软件包：http://www.cnblogs.com/xxoome/p/5866553.html
如果没有安装：执行以下yum命令安装
yum -y install gcc pcre-devel zlib-devel openssl openssl-devel
3.解压部署
cd /usr/local/
tar -zxvf nginx-1.9.9.tar.gz
## 配置 ./configure --prefix=/usr/local/nginx
# make make make install
4.测试是否部署成功
cd/usr/loca/nginx/ ./sbin/nginx -t
正常情况的信息输出：
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
5.启动nginx
cd /usr/local/nginx/sbin ./nginx