libapache2-mod-authn-yubikey software package provides Yubikey authentication provider for Apache, 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 libapache2-mod-authn-yubikey
libapache2-mod-authn-yubikey is installed in your system.
Make ensure the libapache2-mod-authn-yubikey package were installed using the commands given below,
$ sudo dpkg-query -l | grep libapache2-mod-authn-yubikey *
You will get with libapache2-mod-authn-yubikey package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Web Software |
| Package | libapache2-mod-authn-yubikey |
| Version | 1.0-1.1 |
| Description | Yubikey authentication provider for Apache |
| Sub Section | Web |