Lately I stumbled across "penguins eggs" and found it to be an amazing helpful and relatively easy, well documented tool.
It turns out that it makes it easy-peasy to just recreate your running system to a .iso file ..... burn it to USB (or copy to a ventoy formatted USB drive) and boot it up as a live system which is also installable.
Note: It wont work with proprietary stuff like nvidia drivers!
So I took it to the test:
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I setup a totally fresh 3.8.46 system
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themed E16 and E26 to be like Retrowave and installed both
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and then created the .iso which turned out 2.9Gb in size.
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and uploaded it for those wanting to try or play with it.
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Get it here: https://triantares.ddns.net/Elive/uploads/Live-Elive-Edge-Retrowave_amd64_2024-12-28_1657.iso
And it boots just fine as a live OS and includes the "calamares" installer to install to HD.
It runs as user 'Elive' with password 'evilE' and ....
Has '"penguins eggs" already installed as well, making it easy to alter or customize the installation to your liking and then create a new .iso from the installed system.
The .iso will also run fine on a virtual machine like "virtualbox", "vmware" or "qemu", so use that option if uyoure short on hardware.
Check out the extensive documentation on how to make it work here:
https://penguins-eggs.gitbook.io/penguins-eggs-book
It really is loads of fun to play with.
On demand I can create a 32bit version too now.