lilypond software package provides program for typesetting sheet music, 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 lilypond
lilypond is installed in your system.
Make ensure the lilypond package were installed using the commands given below,
$ sudo dpkg-query -l | grep lilypond *
You will get with lilypond package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | TeX |
| Package | lilypond |
| Version | 2.16.2-3 |
| Description | program for typesetting sheet music |
| Sub Section | TeX |