If you use Ubuntu and you need to use MS Teams app, it can be installed easy. Here are all of the necessary steps:
Open MS Teams download page in browser and download Linux DEB (64-bit):
Then open terminal (Ctrl + Alt + T) as superuser (sudo -s) and navigate to Download folder with the file i.e. teams_1.3.00.5153_amd64.deb and execute the following command:
dpkg -i teams_1.3.00.5153_amd64.deb
and that’s all. Now you can open MS Teams app and enjoy your work 