Go2Linux posted a tutorial about converting HTML to PDF from the command line

When you may need to convert a complete web page in html to a pdf file, Linux can help you.
We will need two tools:

wget - To download the complete page, including css, and others
wkhtmltopdf - To make the real conversion from html to pdf

You should be able to install both of them using your package manager.

  Convert html to pdf - Linux