apache2-mpm-event software package provides transitional event MPM package for apache2, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apache2-mpm-event
apache2-mpm-event is installed in your system.
Make ensure the apache2-mpm-event package were installed using the commands given below,
$ sudo dpkg-query -l | grep apache2-mpm-event *
You will get with apache2-mpm-event package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Web Software |
| Package | apache2-mpm-event |
| Version | 2.4.7-1ubuntu4.13 [amd64, i386 |
| Description | transitional event MPM package for apache2 |
| Sub Section | Web |