install skype:

wget https://go.skype.com/skypeforlinux-64.deb
sudo dpkg -i skypeforlinux-64.deb

For distorted or absent sound latency settings may be required:

env PULSE_LATENCY_MSEC=30 skype %U

gnome menu entry to be updated using: Some systems require 60

sudo sed -i 's/^Exec=.*/Exec=env PULSE_LATENCY_MSEC=30 skype %U/' /usr/share/applications/skype.desktop

if skype doesn't start automatically with system, it needs to be added to “Startup Applications”.