laravel 在此服务器上找不到请求的 url

我有一个Ubuntu 14.04内核.我正在这个服务器上安装我的Laravel应用程序.

sudo nano /etc/apache2/sites-available/000-default.conf

I have only these options in the file

<VirtualHost *:80>
        # The ServerName directive sets the request scheme, hostname and port t$
        # 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.example.com

        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html/public/

        # 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

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        # 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>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

I've changed the Document root to

DocumentRoot /var/www/html/public/

现在，当我try 访问我的Laravel应用程序时，从123.xxx.xxx.xxx/开始，它会显示主页，并且运行良好.它还获得所有的GET变量.例句:123.xxx.xxx.xxx?type=wefwef

但当我转到其他链接，例如123.xxx.xxx.xxx/login，它会给我一个错误

Not Found

The requested URL /login/ was not found on this server.

Apache/2.4.7 (Ubuntu) Server at 104.236.234.85 Port 80

我有路由.php在本地主机上运行良好.但不是在这个服务器上.请帮帮我.