This tool is intended to help Penetration testers in the early stages of the penetration test in order to understand the customer footprint on the Internet. It is also useful for anyone that wants to know what an attacker can see about their organization.
Step 1 :
sudo apt-get install subversion
svn checkout http://theharvester.googlecode.com/svn/trunk/ theharvester
Step 2 :
To run it.
python theharvester.py -d microsoft.com -l 500 -b google
That's all! See you.