Linux

7467 readers

397 users here now

A community for everything relating to the GNU/Linux operating system

Also check out:

Original icon base courtesy of [email protected] and The GIMP

founded 2 years ago

MODERATORS

[email protected]

117

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

submitted 5 days ago* (last edited 4 days ago) by [email protected] to c/[email protected]

35 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.

❤️🐧

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 2 points 4 days ago

dd is just cp but more confusing here.
The only thing dd can do that cp can't is stop ahead of time, which only really matters for infinite files like /dev/random

cp /proc/sys/kernel/random/uuid /dev/sda