Download an entire website using wget

wget --random-wait -r -p -e robots=off -U mozilla http://www.example.com

Functions: wget Download an entire website using wget

-p parameter tells wget to include all files, including images.
-e robots=off you don't want wget to obey by the robots.txt file
-U mozilla as your browsers identity.
--random-wait to let wget chose a random number of seconds to wait, avoid get into black list.

Other useful wget parameters:
--limit-rate=20k limits the rate at which it downloads files.
-b continues wget after logging out.
-o $HOME/wget_log.txt logs the output
Other resourcess:
man wget
If U have wget U have man wget also (*correct Me if I wrong)