Patching an ISO

In this guide I will show you how to patch an ISO file. Since ISO files are not writable, we will have to mount the ISO, modify the contents, and then create a new ISO file using the modified contents.

Prerequisites

• A Linux system
• genisoimage package

Installing genisoimage

Debian-based systems

To install genisoimage on debian-based systems, run the following command:

sudo apt-get install genisoimage

Arch-based systems

To install genisoimage on arch-based systems, run the following command:

sudo pacman -S cdrtools

Fedora-based systems

To install genisoimage on fedora-based systems, run the following command:

sudo dnf install genisoimage

Steps

1. Create a directory to mount the ISO file:

mkdir /mnt/iso

1. Mount the ISO file:

sudo mount -o loop file.iso /mnt/iso

1. Modify the contents of the mounted ISO file as needed.

2. Create a new ISO file with the modified contents:

genisoimage -o newfile.iso -r -J /mnt/iso

1. Unmount the ISO file:

sudo umount /mnt/iso

Now you have successfully patched an ISO file.