Whatweb

What web is a tool for web application analysis written by Andrew Horton in 2009.

Install:

Firstable we install Ruby (linux):
sudo apt-get install ruby ruby-dev libopenssl-ruby rubygems1.8
After we install some dipendences of ruby :
sudo gem install anemone em-resolv-replace json bson bson_ext mongo rchardet
Now download whatweb from here

Run

For run whatweb move in to directory (cd ..) and digits ./whatweb
Now you can see the help of whatweb. Whatweb have more than 900 plugins.
Whatweb have 4 levels of "aggression":

passive : Make a single request on the target except redirect.
empty
aggressive: performs a thorough scan of target.
heavy: greater depth of the third level
For make a scan digits :
./whatweb –aggression=3 www.site.com
For more details see the help of whatweb!

If you have any problem or you need some explanations just write under this post !