Dependencies: apt install syslinux-utils rng-tools fakeroot squashfs-tools dpkg-dev.

Main Source Debian repository enabled (e.g., add the line deb-src xenial main restricted universe multiverse to /etc/apt/source.list).

Operating system: Ubuntu (tested on 16.04LTS).

Custom and offline installation: Update the repository within the ISO image to include new deb packages.

Unattended installation: Provide the configurations to create an automated installation procedure.

The article is divided into three main sections: The aim of this article is to describe the procedure to create an Ubuntu ISO image, which provides the installation of additional deb packages without requiring internet connection (offline) and without user interaction (unattended).

In particular, the latest version of the nBox appliance is based on Ubuntu and requires automated and, possibly, offline installation and upgrade processes. The optimized delivery of our products requires the automation of installations and upgrades. 2018 Michele Santuari Unified Monitoring Custom Ubuntu ISO image for unattended and offline installation

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