一、Centos版本：
cat /etc/centos-release
CentOS Linux release 7.1.1503 (Core)
二、nginx下载
官网：http://nginx.org/
版本：nginx-1.8.1.tar.gz
三、安装
解压：tar -xvf nginx-1.8.1.tar.gz
移动到解压目录下
./configure
报错：
./configure: error: the HTTP rewrite module requires the PCRE library.
You can either disable the module by using --without-http_rewrite_module
option, or install the PCRE library into the system, or build the PCRE library
statically from the source with nginx by using --with-pcre=<path> option.
执行安装：
yum -y install pcre-devel
再次执行./configure
报错：
./configure: error: the HTTP gzip module requires the zlib library.
You can either disable the module by using --without-http_gzip_module
option, or install the zlib library into the system, or build the zlib library
statically from the source with nginx by using --with-zlib=<path> option.
安装：
yum install -y zlib-devel
再次./configure
成功。
make
make install
cd /usr/local/nginx/sbin
./nginx
成功！！！