adns-tools software package provides Asynchronous-capable DNS client library and utilities, 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 adns-tools
adns-tools is installed in your system.
Make ensure the adns-tools package were installed using the commands given below,
$ sudo dpkg-query -l | grep adns-tools *
You will get with adns-tools package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Network |
| Package | adns-tools |
| Version | 1.4-2build1 |
| Description | Asynchronous-capable DNS client library and utilities |
| Sub Section | Net |