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The question is if a Linux kernel in any built configuration (without re-writing anything) can 'run' without any file system. It does not have to do anything useful or preserve a state. From all of the answers, I'm understanding that some sort of file system is provided and assumed within the kernel itself, at least until shutdown. Even '/' is a file system. So, I think to simplify the answer it is 'yes'.

Peter L.
– Peter L.

2019-03-22 14:58:58 +00:00
Commented Mar 22, 2019 at 14:58
2

@PeterL. Yes, if you don't rewrite anything Linux will require a file system. When people talk about practical uses for Linux without a file system they would usually be referring to those backed by a block device and you can run Linux without a file system backed by a block device. You'd still have some sort of file system.

kasperd
– kasperd

2019-03-22 22:11:05 +00:00
Commented Mar 22, 2019 at 22:11

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