When I did my first Knoppix remastering back in 2006, using chroot was in practice necessary. But returning to the kind of task a few years later, and following the methods outlined by other forum members here, I found that I didn't need it.
Chroot is important when a brand new OS version is created from scratch, for then there isn't anything to run yet. But I have found that as soon as I have a version able to run, it is much better working from that. And with easily configurable (in several parallel versions) persistent store, running the developing system in something like kvm is a very simple, robust and efficient way of applying and testing changes.
Working from Knoppix 7.6.1 (for example), I can run the ISO in kvm, use the flash installer to install Knoppix on the first partition of a USB SSD disk, and start creating alternatives by modifying the booting .cfg file there. When I then run (the external disk is identified as /dev/sdc)
I can use the booting alternatives in the syslinux file. I can even do remastering safely running from the image to be remastered, if I start without persistence. And after the first remastering, I will have all necessary tools in the cloop image, so it doesn't really matter for this use case whether I use persistence or not.Code:sudo kvm /dev/sdc -m 1024 &
Have I missed something important about chroot, as it doesn't seem to have much to offer for mye actual use?
I will need it for a knxbootstrap utility, but remastering is something quite different today.
AMD EPYC 7282 CPU Processor 16 Cores 32 Threads 2.8GHZ up to 3.2GHZ 120W no lock
$75.00
AMD Ryzen 9 5950X 16-core 32-thread Desktop Processor
$319.99
Intel Xeon E5-2697A V4 2.6GHz CPU Processor 16-Core Socket LGA2011 SR2K1
$39.99
Intel - Core i7-12700K Desktop Processor 12 (8P+4E) Cores up to 5.0 GHz Unloc...
$419.99
Intel - Core i9-12900K Desktop Processor 16 (8P+8E) Cores up to 5.2 GHz Unloc...
$619.99
Intel Quad Core i3-12100 3.3GHz 12MB LGA1700 12th Gen. CPU Processor SRL62
$45.96
AMD Ryzen 5 4500 6-Core 3.6GHz Socket AM4 65W CPU Desktop Processor
$79.00
Intel Core i7-6700 3.40 GHz QUAD Core (4 Core) Desktop Processor 8MB LGA 1151
$59.99
AMD Ryzen 7 7700 Processor (5.3 GHz, 8 Cores, Socket AM5) Boxed -...
$259.99
Intel Core i7-3770 3.40GHz 8MB Quad Core Socket LGA1155 CPU Processor SR0PK
$35.00