比如你有兩個域名，一個是www.a.com 一個是www.b.com

環境搭建：

1.apt-get install apache2

2.apt-get install libapache2-mod-php5 php5

3.apt-get install mysql

4.修改/etc/hosts 

第一行的127.0.0.1 localhost -> 127.0.0.1 www.a.com 

127.0.0.1 www.b.com

5.刪除掉/etc/apache2/sites-enabled的000-default

在/etc/apache2/sites-available新建a.conf和b.conf

a.conf如下

<VirtualHost *:80>
 ServerAdmin [email protected]
 ServerName www.a.com
 DocumentRoot /var/www/a
 <Directory />
  Options FollowSymLinks
  DirectoryIndex index.php index.html index.htm
  AllowOverride None
 </Directory>
 <Directory /var/www/a>
# Options Indexes FollowSymLinks MultiViews
  Options FollowSymLinks
  RewriteEngine On
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule . index.php
  AllowOverride All
  Order allow,deny
  allow from all
 </Directory>
 ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
 <Directory "/usr/lib/cgi-bin">
  AllowOverride None
  Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
  Order allow,deny
  Allow from all
 </Directory>
 ErrorLog ${APACHE_LOG_DIR}/error.log
 # Possible values include: debug, info, notice, warn, error, crit,
 # alert, emerg.
 LogLevel warn
 CustomLog ${APACHE_LOG_DIR}/access.log combined
    Alias /doc/ "/usr/share/doc/"
    <Directory "/usr/share/doc/">
 Options Indexes MultiViews FollowSymLinks
 AllowOverride None
 Order deny,allow
     Deny from all
    Allow from 127.0.0.0/255.0.0.0 ::1/128
</Directory>
</VirtualHost>
 

<VirtualHost *:80>
 ServerAdmin [email protected]
 ServerName www.a.com
 DocumentRoot /var/www/a
 <Directory />
  Options FollowSymLinks
  DirectoryIndex index.php index.html index.htm
  AllowOverride None
 </Directory>
 <Directory /var/www/a>
# Options Indexes FollowSymLinks MultiViews
  Options FollowSymLinks
  RewriteEngine On
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule . index.php
  AllowOverride All
  Order allow,deny
  allow from all
 </Directory>
 ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
 <Directory "/usr/lib/cgi-bin">
  AllowOverride None
  Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
  Order allow,deny
  Allow from all
 </Directory>
 ErrorLog ${APACHE_LOG_DIR}/error.log
 # Possible values include: debug, info, notice, warn, error, crit,
 # alert, emerg.
 LogLevel warn
 CustomLog ${APACHE_LOG_DIR}/access.log combined
    Alias /doc/ "/usr/share/doc/"
    <Directory "/usr/share/doc/">
 Options Indexes MultiViews FollowSymLinks
 AllowOverride None
 Order deny,allow
     Deny from all
    Allow from 127.0.0.0/255.0.0.0 ::1/128
</Directory>
</VirtualHost>
 

ln -s /etc/apache2/mods-available/rewrite.load /etc/apache2/mods-enabled/

7.重啟apache2

apache2ctl restart就OK了...