HOWTO: Make your own Debian Live ISO with live-build (repos included)

[krekhov]

Hi, folks!

If you've ever wanted to build a truly custom Debian-based Live ISO - whether for personal use, testing, or just experimentation - live-build is an incredibly powerful (but underrated) tool. It's the official Debian build system for creating Live systems, and with a bit of scripting you can turn it into anything: a minimal rescue disk, a preconfigured dev environment, or even a gaming-focused distro.

I recently dove into live-build to create KoruX - a minimalist Debian 12 (Bookworm) Live/Installed system tailored for developers and maintainers, with a sprinkle of classic games (Diablo 1/2, Heroes 3, Quake 1-2-3) for fun. It's a hobby project, but the real takeaway is how flexible live-build is once you grasp its structure.

Why live-build?

* Full control: Choose every package, tweak configs, and inject custom scripts.

* Dual-mode: Boot as a Live system or install to disk (I used Calamares for a graphical installer).

* Documentation: The official manual is thorough, and projects like nodiscc/debian-live-config provide great starting points.

What I Learned (and How You Can Start)

1. Start small: Begin with a basic config/ directory (package lists, hooks, etc.).

2. Hooks are magic: Use config/hooks/ to run scripts at build time (e.g., setting up users, themes, or game installers).

3. Hardening matters: I added minimal secure defaults for Firefox, OpenSSL, PAM, sshd, sudoers, GRUB, and sysctl (ASLR). Even for personal projects, it's good practice.

4. Theming is fun: Custom GRUB, login manager, and desktop tweaks make the system feel like yours (works with any DE/DM).

Why Share This?

I'm not here to promote KoruX (it's niche!). Instead, I want to highlight how accessible live-build is for anyone who's ever thought:

• "I wish Debian had [X] by default."
• "I need a portable dev environment."
• "I want to learn how distros are built."

If you've played with live-build, what did you create? Any tips for newcomers? And if you're just starting, what's your dream custom ISO?

(P.S. If you're looking for a minimal template, nodiscc/debian-live-config is a fantastic starting point. You can also search GitHub for other live-build projects for more examples.)

 

[KGIII]

You're probably not going to get a lot of traction using Yandex as your .iso repository.

 

[osprey]

Hi, folks!

Any tips for newcomers?

My tips:

The debian live build manual in English is here: https://live-team.pages.debian.net/live-manual/html/live-manual/index.en.html

It's a long and detailed document with all the relevant information, but for a quick start into building one's own debian, it's possible to read the 3 short tutorials in the document here: https://live-team.pages.debian.net/live-manual/html/live-manual/examples.en.html, and produce some live builds. One can check the requirements from a link on that page before starting.

Once one has created some live builds, the live build manual becomes more relevant for the details on how to make the amendments and variations one may wish to include. I found that to be a useful approach.

 

[krekhov]

My tips:

The debian live build manual in English is here: https://live-team.pages.debian.net/live-manual/html/live-manual/index.en.html

It's a long and detailed document with all the relevant information, but for a quick start into building one's own debian, it's possible to read the 3 short tutorials in the document here: https://live-team.pages.debian.net/live-manual/html/live-manual/examples.en.html, and produce some live builds. One can check the requirements from a link on that page before starting.

Once one has created some live builds, the live build manual becomes more relevant for the details on how to make the amendments and variations one may wish to include. I found that to be a useful approach.

https://live-team.pages.debian.net/live-manual/html/live-manual/examples.en.html is a really good resource, I agree with you

 

[krekhov]

You're probably not going to get a lot of traction using Yandex as your .iso repository.

I wanted to release on GitHub, but my image is larger than GitHub can accept, and I chose Yandex for cloud storage. Do you recommend changing cloud storage?

 

[KGIII]

I wanted to release on GitHub, but my image is larger than GitHub can accept, and I chose Yandex for cloud storage. Do you recommend changing cloud storage?

SourceForge might work. They're reasonably popular and more trusted than Yandex.