Starting July 1, 2017, Microsoft is going to discontinue the classic version of Skype for Linux. Linux users of Skype have to move to the modern Electron-based app.
The classic Skype for Linux, version 4.3, is the last version of Skype with peer-to-peer protocol (P2P) support. The Redmond giant is about to drop server-side support for all older Skype clients which use the peer-to-peer protocol to establish a connection between clients.
Skype for Linux 4.3 is using P2P and it already has issues with modern Skype clients like the web version of Skype or modern Skype for Linux.
For Linux users, Microsoft offers a new Skype app, which is a web app bundled with its own Electron engine. The application is not compatible with older Skype versions, however, it is able to work with all modern releases of the app available for other platforms. As of this writing, its most recent version is 5.2, which still lacks some of the features available in the classic Skype for Linux 4.3 application.
A special notice issued on the download page of Skype for Linux states the following.
Important notice: All Skype for Linux clients version 4.3 and older will be retired on July 1, 2017. To keep chatting, please install the latest version of Skype for Linux.
You can install the new Skype for Linux app using the following download link:
There are statically linked binaries wrapped up with DEB and RPM packages. If you are using Arch Linux or Manjaro, you can install the new app from AUR.