Install NS2 ( Network Simulator ) on Ubuntu

Following are the simple steps to install ns2 on Ubuntu 9+ through launchpad ppa.

1> Firstly remove all ns-allinone-2.3x directory (if you put it anywhere to install ns2) and revert back all the path changes you made in ~/.bashrc related to ns2.


2> Now export the Wouter Horré's ppa repository key by typing the following command on terminal and enter:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys B3F3334F

3> Now add the following ppa repository to source list.

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

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

Reload repository information when prompted by "The information about available software is out-of-date"notification or reload it manually by following command on terminal:

sudo apt-get update

4> Now type the following command on terminal to install ns from the launchpad ppa repository:

sudo apt-get install ns nam xgraph

That's all. 

Type ns to check:
you should see % at the command prompt (indicating successful installation)
Type exit if you get stuck with the %

Now Try to run any example tcl file [You can get it here]

To run a tcl file type the following command:

ns example-tcl-file.tcl