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

submitted 1 day ago* (last edited 6 hours ago) by A_norny_mousse@feddit.org to c/linux@programming.dev

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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 -2 points 23 hours ago

See also: /dev/null

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

[-] victorz@lemmy.world 8 points 23 hours ago* (last edited 8 hours ago)

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

[-] henfredemars@infosec.pub 3 points 22 hours ago

The information will be evenly distributed upon its surface and some believe one day it will be be radiated back out into the rest of the system.

[-] Hamartiogonic@sopuli.xyz 2 points 20 hours ago

That's a horrifying concept. Better not think about it.

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this post was submitted on 24 May 2025

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