If there is any command you miss, let me know and the next update will fix it. You are also absolutely free to contribute to the project. The source code is available on Github.
This app was developed as a part of the Home Remote Control(available on Google Play).
Github: https://github.com/SimonSchubert/LinuxCommandBibliotheca .
Example of commands:
shutdown, reboot, lock/unlock screen, print external/internal ip, print cpu/battery usage, take screenshot/webcame photo, play text to speech, play sound file...