apache2-mpm-prefork software package provides Apache HTTP Server - traditional non-threaded model, 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 apache2-mpm-prefork
apache2-mpm-prefork is installed in your system.
Make ensure the apache2-mpm-prefork package were installed using the commands given below,
$ sudo dpkg-query -l | grep apache2-mpm-prefork *
You will get with apache2-mpm-prefork package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Network |
| Package | apache2-mpm-prefork |
| Version | 2.2.22-1ubuntu1.11 [amd64, i38 |
| Description | Apache HTTP Server - traditional non-threaded model |
| Sub Section | Net |