gspiceui software package provides A graphical user interface for gnucap and ngspice, 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 gspiceui
gspiceui is installed in your system.
Make ensure the gspiceui package were installed using the commands given below,
$ sudo dpkg-query -l | grep gspiceui *
You will get with gspiceui package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Electronics |
| Package | gspiceui |
| Version | 0.9.99+dfsg-1 |
| Description | A graphical user interface for gnucap and ngspice |
| Sub Section | Electronics |