Ubuntu16.04 postman installation: basic steps:

1) : official website to download software package: https://www.getpostman.com/apps

2) : unzip the installation:

sudo tar -xzf Postman-linux-x64-6.0.10.tar.gz

3): Enter the unzipped PostMan folder to open the terminal and start PostMan

./Postman/Postman

4): Create startup icon for quick startup
Create a soft link to create Postman from the extracted Postman file in /usr/bin/

sudo ln -s  /home/c/Downloads/Postman/Postman   /usr/bin/