libxmlsec1-nss software package provides Nss engine for the XML security 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 libxmlsec1-nss
libxmlsec1-nss is installed in your system.
Make ensure the libxmlsec1-nss package were installed using the commands given below,
$ sudo dpkg-query -l | grep libxmlsec1-nss *
You will get with libxmlsec1-nss package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Libraries |
| Package | libxmlsec1-nss |
| Version | 1.2.18-2ubuntu1 |
| Description | Nss engine for the XML security library |
| Sub Section | libs |