adduser software package provides add and remove users and groups, 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 adduser
adduser is installed in your system.
Make ensure the adduser package were installed using the commands given below,
$ sudo dpkg-query -l | grep adduser *
You will get with adduser package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Administration Utilities |
| Package | adduser |
| Version | 3.113ubuntu2 |
| Description | add and remove users and groups |
| Sub Section | Admin |