oxref software package provides cross reference utility, 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 oxref
oxref is installed in your system.
Make ensure the oxref package were installed using the commands given below,
$ sudo dpkg-query -l | grep oxref *
You will get with oxref package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Utilities |
| Package | oxref |
| Version | 1.00.01-1 |
| Description | cross reference utility |
| Sub Section | Utils |