How to make wkhtmltopdf work on Drupal I have installed the drupal Print module, but have not been successful in getting wkhtmltopdf to work. The drupal print documentation is outdated and despite of a number of request to update it, it still is outdated. https://www.drupal.org/node/306882

CASE DESCRIPTION
In my case, I want to allow the creation of pdf versions of nodes. The Nodes have inline CSS (using Tinymce editor with Wysiwyg). I tried using Dompdf library, but the inline css is not being used for the created pdf.

I have read that wkhtmltopdf creates an internal browser that renders a html page, so that should be the ideal solution in this case.

However, after downloading the rpm file from http://wkhtmltopdf.org/ into the sites/all/libraries folder of my website, and installing it using 
   rpm -Uvh wkhtmltox-0.12.2.1_linux-centos6-amd64.rpm
in my website, the library is not recognized, not visible in the status report page and not in the pdf configuration page /admin/config/user-interface/print/pdf
In addition to Yuri's answer, I wanted to provide more detail for how I solved this issue, where I couldn't resolve the following error:


  No PDF generation tool found! Please download a supported PHP PDF generation tool



install the print module
install pdf php handlers and libraries for your environment from https://wkhtmltopdf.org/downloads.html; see note
create symlink in sites/all/libraries/wkhtmltopdf to library in server; make sure symlink is executable to the server sudo chown -h [owner]and sudo chgrp -h [group]
install and enable phpwkhtmltopdf
run drush make --no-core -y sites/all/modules/contrib/phpwkhtmltopdf/phpwkhtmltopdf.make
enable print_pdf_wkhtmltopdf
set up and customize; see recommendations in this blog for more
info


Note: My local dev environment is on a Mac OS X so I had to download and run the package, then create a symlink to sites/all/libraries/wkhtmltopdffrom /usr/local/bin/wkhtmltopdf

Sources:


https://www.drupal.org/node/2430561
https://www.sitepoint.com/effective-pdf-generation-drupal/
https://wkhtmltopdf.org/downloads.html