Sometimes you want to create an offline copy of a site that you can take and view even without internet access. Using wget you can make such copy easily:
wget --mirror --convert-links --adjust-extension --page-requisites --no-parent http://example.org
Explanation of the various flags:
--mirror
– Makes (among other things) the download recursive.
--convert-links
– convert all the links (also to stuff like CSS stylesheets) to relative, so it will be suitable for offline viewing.