lets get into it.
Go to google type powered by eggBlog.net in search box.
Google Dork:"powered by eggBlog.net"
You will get a list of search result now choose a link(like shown below)
Select any url (http://xyz.com/[path])and replace it with this one
now all you have to do now is upload you file(shell/whatever you like )
and access it with this kina url.
So All the best hackers :)