Questions tagged [random]
UNIX random devices and utilities
240 questions
0votes
3answers
35views
Executing a cron task once a month at a random date and time
I've seen a lot of questions about running scripts in random times during a day using bash's $RANDOM but a month exceeds the limit it has. How can I do that?
1vote
2answers
51views
systemd-random-seed.service takes a lot of time to start / timeout
I have a Linux device with several services of my own. Kernel: 4.14.151 systemd: systemd 249 (249.11-0ubuntu3.12) My services are written as sysvinit services and automatically generated as systemd ...
- 791
3votes
4answers
2kviews
Rename files to random filenames (but not to checksums)
Sometimes I need to batch rename files on a macOS system to random or pseudo-random filenames, eight lowercase letters and digits only, e.g. from mcmurdo-station.png to something like a12bc0xy.png. ...
- 1,347
1vote
0answers
69views
AM335X setting of RNG
I kindly request any advice regarding the configuration of the HW RNG of TI AM335X. I'm aiming to achieve security certification for our device, which is based on the PLC Wago PFC200 750-8217. One of ...
- 11
-3votes
1answer
244views
What happens if you put /dev/urandom into a shell script and run it?
I want to know what happens when you run the contents of /dev/urandom as a shell script. I know when you cat it into a terminal it will set off a bunch of random things in the terminal environment. ...
- 111
-1votes
3answers
77views
Why ubuntu 18 not booting inder vmware?
Image imported from AZURE and converted to VMWARE. Booting stop after few seconds. Can't understanding why... Very long loading "random:" and no loading more.
3votes
1answer
424views
CSPRNG use on Amazon Linux 2
I need to use a cryptographically strong (certification requirement), which is of high quality (pass industry standard randomness tests) reasonably performant (see below) PRNG. Originally, I assumed ...
- 133
0votes
1answer
37views
Would it be feasible to create a script that can right click the mouse at a very specific location when an even more specific number gets generated?
I'm aware of a program that can simulate a right-click at specific coordinates on my display at any given interval. However, I'm wondering if it's possible to write a script that can perform a right-...
- 1
-1votes
1answer
320views
How to force =RAND() to run only once in LibreOffice Calc?
I am trying to randomize a list of words in LibreOffice Calc. Column A contains numbers 1 to 15, indicating the initial order of the words. Column B contains the words themselves. Here is the original ...
3votes
2answers
2kviews
Faster wipe hdd with random data
I know that with dd if=/dev/urandom of=/dev/sdX bs=1M count=hdd_size_in_MB you can wipe a whole disk with random data. But urandom is very slow. So I wonder if it would be possible to just create ...
- 135
0votes
0answers
337views
Fast, cryptographically strong PRNG using /dev/urandom
Edit to make the question more specific: Can a program just read from /dev/urandom to provide high quality, cryptographically strong random numbers at a rate of at least 1MB/sec on a Ubuntu LTS VM in ...
- 133
2votes
2answers
3kviews
How to generate random master password?
I want to generate a secure random password for the encrypted Linux system. What offline tools should I use? Any advice if I should use xkcdpass, apg, diceware, or another utility, and how built ...
- 121
0votes
1answer
1kviews
Setting up rngd (randomness generator) on old computers
The rngd program comes from package rng-tools5 on Ubuntu/Debian. # neofetch ...-:::::-... root@dell-7577 .-MMMMMMMMMMMMMMM-. -------------- ...
- 30.2k
0votes
0answers
757views
understanding fio test results - 90th percentiles benchmark - Latency --> avg/stdev?
What are the relationships in storage benchmarking with fio between the average(avg) and standard deviation (stdev) at latency? Avg / stdev at latency is important for sequential or random test? Most ...
4votes
2answers
438views
reinitialize random to be reinitialized
Printing the $RANDOM variable in zsh is giving me the same result if I don't use it in another context. It's like the shell has a cache of command outputs or variable values so I can't have the new ...
- 177
