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[Bug-xorriso] Updating iso files

From: vincentmeier
Subject: [Bug-xorriso] Updating iso files
Date: Sat, 11 Aug 2018 19:52:30 +0000
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everything I could find on the net regarding iso files is that they are read only. However, after coming across the xorriso man page it looks like it might be possible to modify iso files, though I rarely see USB devices mentioned. The average iso file from a linux live CD consists of kernel, initrd, squashed file system, files required for boot etc. If you dd this file to an USB stick could you later update files either directly in the iso file or by sort of appending new files and hiding the older versions? I am wondering if you could update the kernel, initrd without creating a completely new iso file? It would be even more useful to do the same for the squashed file system without creating a new one (which depending on the size and cpu speed/number of cores can take a while) Afaik you can append data to squashed file systems, the question is if this could work in combination with the iso file?


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