gregorio software package provides command-line tool to typeset Gregorian chant, 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 gregorio
gregorio is installed in your system.
Make ensure the gregorio package were installed using the commands given below,
$ sudo dpkg-query -l | grep gregorio *
You will get with gregorio package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | X Window System software |
| Package | gregorio |
| Version | 2.3-1 |
| Description | command-line tool to typeset Gregorian chant |
| Sub Section | x11 |