Just copy and paste this in your terminal server.. “How to Install wkhtmltopdf on Ubuntu 14.04” is published by Lazy Dev.
And last layer as sigmoid
If you find any bugs or having difficulty to understand the code, feel free to make a issue/pull in gihub or comment here.
When people hurt you over and over, think of them like sandpaper. They may scratch and hurt you a bit, but in the end you end up polished and they end up useless