Install Skype on Ubuntu with an alert wrapper

To install Skype, it is preferable to use the Ubuntu repository, which will install everything needed to manage sound and video properly.
If you take the package available on the official website, it is likely that the sound will not be managed properly.

1 – Install Skype:
sudo add-apt-repository -y ppa:andykimpe/skype && sudo apt-get update
sudo apt-get install skype

2 – Install the wrapper:
sudo add-apt-repository ppa:skype-wrapper/ppa
sudo apt-get update && sudo apt-get install skype-wrapper

Version context

This procedure describes the software and the environment available at the time of its publication. The packages, interfaces, and repositories mentioned may have changed or disappeared; first check the system version and its support level.

cat /etc/os-release
uname -r

Work on a backup or a snapshot, note every modified file, and prepare for rollback. For a current workstation or server, prefer signed packages from officially supported repositories.

Reference: official Ubuntu lifecycle.