Can you take a look at the requesting help suggestions? That thread contains useful information that helps us help you. 
From my perspective I don’t know what cp and other commands do, so it would also help if you can describe your problem in platform-agnostic terms.
This doesn’t necessarily have to be a problem with the /content/ directory. It might also be that your theme’s layout files are moved or not used anymore for the content file in question. That would also give blank pages.
To debug that you can take a look at Hugo’s lookup order to see if your content files have a proper layout file for them.