aggregate software package provides ipv4 cidr prefix aggregator, 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 aggregate
aggregate is installed in your system.
Make ensure the aggregate package were installed using the commands given below,
$ sudo dpkg-query -l | grep aggregate *
You will get with aggregate package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Network |
| Package | aggregate |
| Version | 1.6-6 |
| Description | ipv4 cidr prefix aggregator |
| Sub Section | Net |