才设置了http2，结果蓝狗说我网站不安全，检测一下发现openssl有漏洞，于是准备升级一下openssl
检测网站： www.ssllabs.com/ssltest/analyze.html
# Based on http://fearby.com/article/update-openssl-on-a-digital-ocean-vm/ $ apt-get update
$ apt-get dist-upgrade $ wget ftp://ftp.openssl.org/source/old/1.0.2/openssl-1.0.2h.tar.gz
$ tar -xvzf openssl-1.0.2h.tar.gz
$ cd openssl-1.0.2h
//如果没有安装gcc，这里会报错
$ yum -y install gcc
$ ./config --prefix=/usr/
$ make depend
$ sudo make install
$ openssl version
# OpenSSL 1.0.2h May # now restart your nginx or other server
$ nginx -s reload