dia-shapes software package provides Diagram editor, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dia-shapes
dia-shapes is installed in your system.
Make ensure the dia-shapes package were installed using the commands given below,
$ sudo dpkg-query -l | grep dia-shapes *
You will get with dia-shapes package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Graphics |
| Package | dia-shapes |
| Version | 0.1 |
| Description | Diagram editor |
| Sub Section | Graphics |