To get Termius, please, follow the relevant link below.
Termius for Linux can be installed from a deb package (64-bit) or via Snap.
Some recent versions of Linux, including Ubuntu 16.04 LTS and newer, include Snap support. If your distribution of choice doesn't have it installed, please follow these instructions.
Once installed, you can begin installation or run:
sudo snap install termius-app
Termius supports Android 5 and newer.