btyacc software package provides Backtracking parser generator based on byacc, 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 btyacc
btyacc is installed in your system.
Make ensure the btyacc package were installed using the commands given below,
$ sudo dpkg-query -l | grep btyacc *
You will get with btyacc package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Development |
| Package | btyacc |
| Version | 3.0-5 |
| Description | Backtracking parser generator based on byacc |
| Sub Section | devel |