For the installation, you follow the steps listed below.
If you don't have the alien command, install it with a command such as $sudo apt-get install alien
Download the Nmap RPMs for your platform (x86 or x86-64) from http://nmap.org/dist/nmap-6.46-1.i386.rpm or from http://nmap.org/dist/nmap-6.46-1.x86_64.rpm...