There's plenty of reasons why one would want to convert a webpage to a PDF document. And there's numerous ways on how one can convert that web page (HTML) into a PDF file. Check out this video tutorial on how to convert webpage HTML to PDF on Ubuntu Linux.
You could just select "Print" (in Firefox: File… Print), and then select "Print to file" and the output "PDF".
To install wkhtmltopdf in Ubuntu, run the following command in a terminal:
sudo apt-get install wkhtmltopdf
Then, to convert a webpage to PDF, open a terminal and type this:
wkhtmltopdf http://www.bbc.com ~/Desktop/bbc.pdf
Replacing http://www.bbc.com and bbc.pdf with the website you want to convert to PDF / the name you desire for the converted PDF file.
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