I am trying to update one of my article at http://enli.co.cc/tutorials/how-to-install-anything-in-ubuntu-a-compilation/ but I get redirected to 404 page with title of the page "Nothing found for wp-admin post php". I tried numerous suggestions from many sources but nothing worked.
So I spent an hour figuring out for which text portion I get this error. Apparently if any of my posts contain "/etc/" I get above 404 error. For other variations of text e.g. "/ etc/" or "/etc /" the posts get published as they should.
What could be causing this? I recently changed my host, could it be because of some module security?