If you ever need to download an entire Web site, perhaps for off-line viewing, wget can do the
job – for example:

$ wget \
     --recursive \
     --domains website.org \
     --no-parent \
     --page-requisites \
     --html-extension \
     --convert-links \
     --restrict-file-names=windows \
     --no-clobber \
         www.website.org/tutorials/html/

This command downloads the Web site www.website.org/tutorials/html/.

The options are:

• –recursive: download the entire Web site.
• –domains website.org: don’t follow links outside website.org.
• –no-parent: don’t follow links outside the directory tutorials/html/.
• –page-requisites: get all the elements that compose the page (images, CSS and so on).
• –html-extension: save files with the .html extension.
• –convert-links: convert links so that they work locally, off-line.
• –restrict-file-names=windows: modify filenames so that they will work in Windows as well.
• –no-clobber: don’t overwrite any existing files (used in case the download is interrupted and
  resumed).

Saved from http://www.linuxjournal.com/content/downloading-entire-web-site-wget