@SOLOSOFT Traceback points to a typical python pip egg_info error. Please remove frappe folder (from /home) , .bench (from /tmp) once again and install dependencies for Ubuntu 16.04:
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install python-minimal
sudo apt-get install build-essential python-setuptools
Hopefully, this will complete the bench installation and rest of the steps illustrated in earlier post.