Wp-admin works but not website
A few days ago my website, after months of my website being up, went down. The thing is mysite.com/wp-admin works just fine and I can access the Wordpress Dashboard. Furthermore, I can access and view all other domain's on this server.
Here is the structure of the folders (in case that matters)
The site that is not working is in /var/www/
The working site is in /var/www/mysite2.com
I am running on Ubuntu 14.04 LAMP