Cat /dev/random file

BobRoberts I has similar adventures, with similar outcomes. I also used to ssh into colleagues' linux workstations and cat DTMF tones to the internal speaker, then play a busy tone, so it sounded like their PC was trying to FAX something out. Ah, good times. TimKennedy how do you do that? Show 1 more comment. Active Oldest Votes.

If you need a certain amount of random data, use dd. Improve this answer. Community Bot 1. If the application is critical in a cryptographic sense you must go and read up on the matter, and perhaps hire an expert. And do not use a Mersenne twister to do crypto. Gilles, maybe I'm loosing it I agree with everything you say, ans can't see where I said anything different. Show 3 more comments. Sign up or log in Sign up using Google. Sign up using Facebook. Improve this question. Stefan Lasiewski Stefan Lasiewski Add a comment.

Active Oldest Votes. Improve this answer. Chris 3 3 bronze badges. Gilles 'SO- stop being evil' Gilles 'SO- stop being evil' k gold badges silver badges bronze badges. StefanLasiewski tail first tries to go to the end of the input file, which takes forever literally.

Show 3 more comments. Haozhun 4 4 bronze badges. Daniel Pittman Daniel Pittman 7, 2 2 gold badges 28 28 silver badges 17 17 bronze badges. A note -- unit specifications like 1M are not available in every standard dd variant.

The example command will create a file of count 1,, blocks each of size 1 MB. As an aside, up to a point, increasing block size and reducing the block count tends to yield better throughput for a given amount of output data.

GB vs GiB. ImHere ImHere James Jithin James Jithin 1 1 silver badge 8 8 bronze badges. Ashwin Ashwin 66 4 4 bronze badges. Find centralized, trusted content and collaborate around the technologies you use most.

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