UNIX random devices and utilities

learn more… | top users | synonyms

3
votes
1answer
521 views

Debian Jessie - Random freezes

I have a fresh installation of Debian Jessie, with Cinnamon and Gnome. I run it on a decent computer with the following specs: Athlon II x3, 6GB DDR2, 2GB SWAP (swapiness minimum), 600GB SATA HDD ...
3
votes
1answer
40 views

How random is the pseudo random number generators on live boot disks? Is there a way to seed it?

I know that random number generators on computers are only pseudo-random, but are the PRNGs on Live Boot USB or DVDs even less random? Is there a way to seed them after booting? Specifically curious ...
2
votes
1answer
98 views

What entropy sources are used by the Linux kernel?

man 4 random has a very vague description of Linux kernel entropy sources: The random number generator gathers environmental noise from device drivers and other sources into an entropy ...
2
votes
1answer
59 views

What is the correct available entropy on UNIX systems?

I have three questions related to entropy on UNIX systems: I check entropy on Linux using: cat /proc/sys/kernel/random/entropy_avail. Is this the standard place with information about available ...
0
votes
1answer
75 views

php shell_exec() + /dev/hwrng: no output

I have this PHP script: <?php $od = shell_exec('od /dev/hwrng --address-radix=n --read-bytes=4 --format=u4'); ?> <html> <head> <title>hwrng</title> </head> ...
1
vote
0answers
110 views

xdotool random/more natural delay?

For automated testing of some applications, I would like to emulate the users behaviour. I know I can user the xdotool type --delay option, but I would like a more natural delay. The easiest thing ...
0
votes
0answers
20 views

adapt this yates-fisher code for a random generator

I am trying to make my version of a random number generator that doesn't leave bash scripting language. Starting with a yates-fisher shuffle, i am trying to use this as the starting point...and go ...