I have a vps with magento installed on it, but yesterday I tried rebooting the vps and since then my site isn't accessible. It just shows the Apache 2 Ubuntu default page. How do I fix this?
Maybe your apache vhosts for the domain is non existent. check apache config file for the domain virtual host settings. More than likely its not there anymore. You need to use a control panel like Webmin to handle this easier.