libns3-3 software package provides shared libraries of ns-3, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libns3-3
libns3-3 is installed in your system.
Make ensure the libns3-3 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libns3-3 *
You will get with libns3-3 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Network |
| Package | libns3-3 |
| Version | 3.17+dfsg-1build1 |
| Description | shared libraries of ns-3 |
| Sub Section | Net |