Installation of NS2 in ubuntu

I tried to install ns2 and downloaded its code to install it in my ubuntu10.10 system but it was tedious task.
And then i found that following steps were the most simplest way to install ns2.

step 1: make sure that u don't have any previous installation of ns2.

step 2: export the key for ppa
           #sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys B3F3334F

step 3: add ppa to your source. You can get this file /etc/apt/source.list. Simply append these line to source.list file.
       
             deb http://ppa.launchpad.net/wouterh/ppa/ubuntu karmic main

             deb-src http://ppa.launchpad.net/wouterh/ppa/ubuntu karmic main

step 4: now reload your apt-cache 

            #sudo apt-get update 

            or simply reload your synaptic package manager

step 5: install ns2

             #sudo apt-get install ns nam xgraph

      now ns2 installed.

Test run:

download sample code that is tcl file.

run this code

         # ns example1b.tcl

for more help

done......  enjoy coding..