Plesk与cPanel和Ensim并称为最常见的三款虚拟主机管理软件。

更全的参考http://blog.csdn.net/li_yadan/archive/2006/02/16/600580.aspx

1, 生成 server.key

sudo openssl genrsa -des3 -out server.key 1024

运行结果

Generating RSA private key, 1024 bit long modulus
…………………++++++
……………..++++++
unable to write ‘random state’
e is 65537 (0×10001)
Enter pass phrase for server.key:

输入pass phrase生成server.key。(以后每次重启apache2 需要此pass phrase)

2，生成CSR

sudo openssl req -new -key server.key -out server.csr

运行后需要输入一系列信息，包括“Company Name”， “Site Name”等，最后产生server.csr。

3, 生成自签名证书(self-signed certificate)

sudo openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt

输入 pass phrase 后，产生server.crt

4，安装证书

sudo cp server.crt /etc/ssl/certs

sudo cp server.key /etc/ssl/private

5，配置 ssl 对应的虚拟主机
Listen 443

SSLEngine on
SSLCertificateFile /etc/ssl/certs/server.crt
SSLCertificateKeyFile /etc/ssl/private/server.key
。。。

6，重启 apache2

sudo /etc/init.d/apache2 restart

以 51kaiyuan.com为例，运行结果如下：

 * Restarting web server apache2
apache/2.2.8 mod_ssl/2.2.8 (Pass Phrase Dialog)
Some of your private key files are encrypted for security reasons.
In order to read them you have to provide the pass phrases.

Server www.51kaiyuan.com:443 (RSA)
Enter pass phrase:

此处需要输入 pass phrase，输入正确后启动成功。

参考文献：https://help.ubuntu.com/7.10/server/C/httpd.html#https-configuration