avahi-daemon software package provides Avahi mDNS/DNS-SD daemon, 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 avahi-daemon
avahi-daemon is installed in your system.
Make ensure the avahi-daemon package were installed using the commands given below,
$ sudo dpkg-query -l | grep avahi-daemon *
You will get with avahi-daemon package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Network |
| Package | avahi-daemon |
| Version | 0.6.30-5ubuntu2 |
| Description | Avahi mDNS/DNS-SD daemon |
| Sub Section | Net |