linux下爲apache配置虛擬主機
區別於Windows 下Apache，配置文件通常只有一個，就是httpd.conf。
本機環境是通過 apt-get install xxx
Linux下 Apache的配置文件是 /etc/apache2/apache2.conf，Apache在啓動時會自動讀取這個文件的配置信息。而其他的一些配置文件，如 httpd.conf等，則是通過Include指令包含進來。
在apache2.conf裏有sites-enabled目錄，而在 /etc/apache2下還有一個sites-available目錄，其實，這裏面纔是真正的配置文件，而sites- enabled目錄存放的只是一些指向這裏的文件的符號鏈接，你可以用ls /etc/apache2/sites-enabled/來證實一下。
所以，如果apache上配置了多個虛擬主機，每個虛擬主機的配置文件都放在 sites-available下，那麼對於虛擬主機的停用、啓用就非常方便了：當在sites-enabled下建立一個指向某個虛擬主機配置文件的鏈 接時，就啓用了它；如果要關閉某個虛擬主機的話，只需刪除相應的鏈接即可，根本不用去改配置文件。
1. sudo cp /etc/apache2/sites-avaliable/000-default.conf , 命名爲 test.conf
2.修改配置文件：test.conf
<VirtualHost *:80>
# The ServerName directive sets the request scheme, hostname and port that
# the server uses to identify itself. This is used when creating
# redirection URLs. In the context of virtual hosts, the ServerName
# specifies what hostname must appear in the request's Host: header to
# match this virtual host. For the default virtual host (this file) this
# value is not decisive as it is used as a last resort host regardless.
# However, you must set it for any further virtual host explicitly.
ServerName www.test.com
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html/test/
ErrorLog /var/www/html/test/error.log
CustomLog /var/www/html/test/access.log combined
<Directory "/var/www/html/test">
Options FollowSymLinks
DirectoryIndex index.php index.html index.htm
AllowOverride All #注意這個地方的配置，會影響本地目錄下的.htaccess的啓用
Order deny,allow
Allow from All
</Directory>
# Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the loglevel for particular
# modules, e.g.
#LogLevel info ssl:warn
# For most configuration files from conf-available/, which are
# enabled or disabled at a global level, it is possible to
# include a line for only one particular virtual host. For example the
# following line enables the CGI configuration for this host only
# after it has been globally disabled with "a2disconf".
#Include conf-available/serve-cgi-bin.conf
</VirtualHost>
3. 建立鏈接文件：
sudo ln -s /etc/apache2/sites-available/test.conf /etc/apache2/sites-enabled/test.conf
或者： sudo a2ensite test.conf
4.重啓apache 服務器
sudo /etc/init.d/apache2 restart
5. 修改hosts(/etc/hosts)
添加127.0.0.1 www.test.com
到這裏基本就可正常訪問了！
附：如果這裏還需要對目錄級的URL重寫支持，繼續往下：
1. 終端運行
sudo a2enmod
程序提示可供激活的模塊名稱，輸入：rewrite
成功會提示 rewrite already load
2. 修改/etc/apache2/sites-enabled/test.conf (該鏈接指向的是站點配置文件)
把下的AllowOverride 屬性改爲All，保存。(上面我們已經配置爲 All)
3. 重新加載apache
sudo /etc/init.d/apache2 restart