On 02/01/2016 02:46 PM, Valeri Galtsev wrote:
Will doing rm -rf / actually delete anything in /sys? IMHO, not.
Yes, it will. Probably. It's possible that it'll hang on some of the files in /proc if it gets to that directory before /sys, but that's largely a matter of chance.
The above command first will get to removing /dev, and it will delete /dev/sda1 or whichever device / filesystem lives on. And after that the command will fail, as there will be nothing accessible under / on that system after device root filesystem "/" lives on will be deleted.
Access to your filesystems doesn't depend on the device nodes after they're mounted. You can remove all of the nodes in /dev, and your filesystems remain available. Spin up a VM and test it. I promise, it works.
And portion of /dev - whatever alphabetically is before root filesystem device.
rm doesn't process files in alphabetical order. It processes them in directory order, which is unpredictable.
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