Configure Repos On Debian 9.0.0 AMD64 XFCE 1.0 Stable:

Steps:
1. Login as root.
2. Open terminal, and type "sed -i '5s/deb cdrom:/#deb cdrom:/' "/etc/apt/sources.list"".
3. In terminal, and type "sed -i '15,16s/# deb/deb/' "/etc/apt/sources.list"". 
4. In terminal, and type "echo 'deb http://deb.debian.org/debian/ stretch main' >> "/etc/apt/sources.list"". This will comment out the Debian cd entry.
5. In terminal, and type "echo 'deb-src http://deb.debian.org/debian/ stretch main' >> "/etc/apt/sources.list"". This will comment out the Debian cd entry.
6. In terminal type "apt-get update".

Notes:
- These steps assume a the Debian 9.0.0 AMD64 XFCE CD 1 was used to install, that no software repository network mirror was configured during the installation process, and that no changes have been made to "/etc/apt/sources.list". 

Authors:James Daniel Marrs Ritchey
License:Comprehensible Open License 1.0
[quote]
Comprehensible Open License 1.0:

Material published under this license can be modified, forked, incorporated into other works, and distributed, provided the material remains under this license. Material published under this license is free of charge! Material published under this license is bound to the license release number it was published under. Material published under this license is provided as is. The author of material published under this license shan't be held liable for any negative occurrences that arise from use of the material the author published under this license.
[/quote]