apache2 software package provides Apache HTTP Server, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apache2
apache2 is installed in your system.
Make ensure the apache2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep apache2 *
You will get with apache2 package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Web Servers |
| Package | apache2 |
| Version | 2.4.10-10+deb8u7 |
| Description | Apache HTTP Server |
| Sub Section | HTTPD |