This library is used to create pdf from html.

Steps to install:

#Install wkhtmltopdf library in ruby by using below command:

apt-get install wkhtmltopdf

#Use below command to find the path. This path need to add in in pdfkit.rb[in initializers folder]

which wkhtmltppdf

Once wkhtmltopdf installed then install Pdfkit

    gem install pdfkit

If pdfkit.rb is not present in initializers folder then create it with following content

 **PDFKit.configure do |config|
config.wkhtmltopdf = '/usr/bin/wkhtmltopdf'
config.default_options = {
:page_size => 'A4',
:print_media_type => true
}
end**

Note: If you get any error like [BROKEN PIPE] Then
please follow following steps:

1. remove wkhtmltopdf
   
2. then install wkhtmltopdf with following steps:

  login as root  
  wget http://wkhtmltopdf.googlecode.com/files/wkhtmltopdf-0.9.9-static-amd64.tar.bz2
  tar xvjf wkhtmltopdf-0.9.9-static-amd64.tar.bz2
  mv wkhtmltopdf-amd64 /usr/local/bin/wkhtmltopdf
  chmod +x /usr/local/bin/wkhtmltopd

Again run this command

  which wkhtmltppdf          #to find the path. This path need to add in in pdfkit.rb[in initializers folder]
  Set path in pdfkit.rb[in initializers folder]

This will resolve the above problem