Termux

Termux is an Android terminal emulator and Linux environment app that works directly with no rooting or setup required
  1. Download and Install the Termux app in the Playstore.

2. Run the app and install the SSH for the program by typing:

pkg install openssh

3. Setup your instance in the different cloud providers.

4. Connect your instance by using the Termux app and use the following command:

ssh root@<INSTANCEIPADDRESS>

5. Click "yes" for authentication and retype again the command to access your instance. After that, type the unique password associated with your instance that comes from your cloud provider.