libstrongswan software package provides strongSwan utility and crypto library, 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 libstrongswan
libstrongswan is installed in your system.
Make ensure the libstrongswan package were installed using the commands given below,
$ sudo dpkg-query -l | grep libstrongswan *
You will get with libstrongswan package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Network |
| Package | libstrongswan |
| Version | 5.1.2-0ubuntu2.4 [amd64, i386] |
| Description | strongSwan utility and crypto library |
| Sub Section | Net |