iverilog software package provides Icarus verilog compiler, 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 iverilog
iverilog is installed in your system.
Make ensure the iverilog package were installed using the commands given below,
$ sudo dpkg-query -l | grep iverilog *
You will get with iverilog package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Electronics |
| Package | iverilog |
| Version | 0.9.5-1 |
| Description | Icarus verilog compiler |
| Sub Section | Electronics |