byacc software package provides public domain Berkeley LALR Yacc parser generator, 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 byacc
byacc is installed in your system.
Make ensure the byacc package were installed using the commands given below,
$ sudo dpkg-query -l | grep byacc *
You will get with byacc package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Development |
| Package | byacc |
| Version | 20110908-1 |
| Description | public domain Berkeley LALR Yacc parser generator |
| Sub Section | devel |