first of all i want to say that i made my project to detect the hands sign language not just the face, because i want it to be helpfull and having a meaning. i used my windows to do this task so i run the codes in my windows command prompt and Jupyter Notebook i Installed the Tensorflow Object Detection by following the next link https://youtu.be/dZh_ps8gKgs
then to apply the object detection and learn&train the machine i followed the next link https://youtu.be/pDXdlXlaCco