"If you want to be notified when and how a Web site has changed,
you can turn to either netstiff or urlwatch to keep and eye on
things for you. Both of these tools monitor Web sites for changes
and allow you to see a diff-like output of exactly what has
changed. You can also use netstiff to monitor FTP sites for
"I couldn't find any packages of netstiff or urlwatch for
mainstream Linux distributions, though there is a .deb file
available through netstiff's freshmeat page..."