restore last session on ubuntu 18.04

gistfile1.txt

sudo apt install gnome-shell-extensions
sudo apt-get remove nodejs npm ## remove existing nodejs and npm packages
sudo apt-get install curl  
curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
sudo apt-get install -y nodejs  
sudo apt-get install npm
npm install -g linux-window-session-manager
https://github.com/johannesjo/gnome-shell-extension-window-session-manager
verify if node and npm installed : node -v and rpm -v 
to launch : https://itsfoss.com/gnome-shell-extensions/