Skype Ubuntu 64bit repo

$ wget -q -O - https://repo.skype.com/data/SKYPE-GPG-KEY | sudo apt-key add -
$ sudo sh -c 'echo "deb [arch=amd64] https://repo.skype.com/deb stable main" > /etc/apt/sources.list.d/skype-stable.list'
$ sudo apt-get update && sudo apt-get install skypeforlinux -y

source: http://www.linuxrussia.com/skype-ubuntu.html