libjack-jackd2-dev software package provides JACK Audio Connection Kit (development files), 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 libjack-jackd2-dev
libjack-jackd2-dev is installed in your system.
Make ensure the libjack-jackd2-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libjack-jackd2-dev *
You will get with libjack-jackd2-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | libjack-jackd2-dev |
| Version | 1.9.9.5+20130622git7de15e7a-1u |
| Description | JACK Audio Connection Kit (development files) |
| Sub Section | libdevel |