I'm trying to install this and I'm up to this step:
sudo mv RaspberryPints-x.x.x.x/* /var/www/ (where “x.x.x.x” is the version number you downloaded)

I'm getting a bunch of script that says "mv:cannot move 'raspberrypints-2.0.1/xxxx' to /var/www/xxx Directory not empty."
"xxxx" being the folder inside the unzipped file in home/pi

Where do I go from here? I'm an extreme novice...