libgd-ruby software package provides Transitional package for ruby-gd, 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 libgd-ruby
libgd-ruby is installed in your system.
Make ensure the libgd-ruby package were installed using the commands given below,
$ sudo dpkg-query -l | grep libgd-ruby *
You will get with libgd-ruby package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Graphics |
| Package | libgd-ruby |
| Version | 0.8.0-6 |
| Description | Transitional package for ruby-gd |
| Sub Section | Graphics |