paperkey software package provides extract just the secret information out of OpenPGP secret keys, 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 paperkey
paperkey is installed in your system.
Make ensure the paperkey package were installed using the commands given below,
$ sudo dpkg-query -l | grep paperkey *
You will get with paperkey package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Utilities |
| Package | paperkey |
| Version | 1.3-2 |
| Description | extract just the secret information out of OpenPGP secret keys |
| Sub Section | Utils |