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cat /proc/sys/kernel/random/uuid [I ❤️ Linux] (feddit.org)

submitted 5 days ago* (last edited 4 days ago) by A_norny_mousse@feddit.org to c/linux@programming.dev

26 comments fedilink hide all child comments

That's all. I just found this in a random script. Generates a random UUID every time it's called. I didn't know.

Of course I can also use uuidgen or pipe /dev/(u)random into something to get a random alphanumeric string - but this is built right into the kernel!

In /proc/sys/kernel/random/, there's also boot_id which ~~seems to do the same~~ is static, and some tweakable parameters.

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[–] Hamartiogonic@sopuli.xyz -1 points 5 days ago (13 children)

See also: /dev/null

It’s basically a black hole where you can throw anything.

[–] victorz@lemmy.world 9 points 5 days ago* (last edited 5 days ago) (12 children)

cat /proc/sys/kernel/random/uuid > /dev/null

[–] Hamartiogonic@sopuli.xyz 1 points 5 days ago (6 children)

That reminds me of the CPU stress test I ran many years ago.

dd if=/dev/random of=/dev/null

If you have 8 cores, just open 8 terminals, and run that code in each of them.

[–] YerbaYerba@lemm.ee 4 points 5 days ago

/dev/urandom should stress the CPU more. /dev/random can be entropy limited

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