1、查看nginx当前版本
通过nginx -V 命令就可以查看当前的版本，已经当前版本安装时候的一些nginx命令

[root@taotao sbin]# ./nginx -V
nginx version: nginx/1.10.3
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-17) (GCC) 
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: --user=www --group=www --with-http_stub_status_module --with-http_ssl_module

2、下载新版本的nginx

wget  http://nginx.org/download/nginx-1.12.1.tar.gz

3、解压缩新版本nginx

tar xf nginx-1.12.1.tar.gz

cd nginx-1.12.1

4、编译并修改文件

./configure –user=www –group=www –with-http_stub_status_module –with-http_ssl_module

make

cd /usr/local/nginx/sbin

mv nginx nginx_old

cp /root/nginx-1.12.1/objs/nginx .

5、执行升级

[root@taotao nginx-1.12.1]# make upgrade
/usr/local/nginx/sbin/nginx -t
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
kill -USR2 `cat /usr/local/nginx/logs/nginx.pid`
sleep 1
test -f /usr/local/nginx/logs/nginx.pid.oldbin
kill -QUIT `cat /usr/local/nginx/logs/nginx.pid.oldbin`

6、查看是否升级成功

[root@taotao sbin]# ./nginx -V
nginx version: nginx/1.12.1
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-17) (GCC) 
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: --user=www --group=www --with-http_stub_status_module --with-http_ssl_module