Apache 搭建HTTPS Virtual Host
　　1.创建SSL证书
　　首先需要安装openssl，linux系统默认已安装，如没有则用以下命令安装：
　　sudo apt-get install openssl
　　sudo apt-get install libssl-dev
　　创建证书：
　　cd /etc/ssl/private
　　sudo openssl req -new -x509 -days 365 -sha1 -newkey rsa:1024 -nodes -keyout demo.key -out demo.crt
　　参数说明：
　　-x509 显示证书和签名工具
　　-days 证书的有效期
　　-sha1 证书加密算法
　　-newkey rsa:1024 创建一个新key，1024表示公钥长度为1024bits
　　命令执行完会创建demo.key与demo.crt
　　更多参数说明可以参考：http://www.openssl.org/docs/apps/openssl.html
　　创建步骤：
root@ubuntu:/etc/ssl/private# sudo openssl req -new -x509 -days 365 -sha1 -newkey rsa:1024 -nodes -keyout demo.key -out demo.crt
Generating a 1024 bit RSA private key
.......++++++
...........++++++
writing new private key to 'demo.key'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value，
If you enter '.'， the field will be left blank.
-----
Country Name (2 letter code) [AU]:CN
State or Province Name (full name) [Some-State]:GD
Locality Name (eg， city) []:GZ
Organization Name (eg， company) [Internet Widgits Pty Ltd]:fdipzone.Ltd
Organizational Unit Name (eg， section) []:test
Common Name (eg， YOUR name) []:demo.fdipzone.com
Email Address []:fdipzone@gmail.com
root@ubuntu:/etc/ssl/private#