How to generate a random integer with specific range(for example, from 1 to 1000)?
Also, how to convert a floating point number into a integer? (2 Replies)
I need a function to generate a random alphanumeric password in C code. It needs to be between 6-8 characters and follow the following rules:
Reject if same char appears # time: 4 or more
Reject if same char appears consecutively: 3 or more
I have the following random password working for... (2 Replies)
Hi, Guz!
I'm working on a scripts compiler which needs a function to generate random strings. I think REGX may be a good solution to restrict the string format. Before DIYing I'd like asking for any existing libs or codes.
Any help will be appreciated! (7 Replies)
I saw this formula to generate random number between two specified values in shell script.the following.
$(((RANDOM%(max-min+divisibleBy))/divisibleBy*divisibleBy+min))
Give a example in book.
Generate random number between 6 and 30.like this.
$(((RANDOM%30/3+1)*3))
But I have a... (1 Reply)
Hi
I am new to expect. Please if any one can help on my issue its really appreciable. here is my issue:
I want expect script for random passwords and random commands generation.
please can anyone help me?
Many Thanks in advance (0 Replies)
hi guys,
I am writing a c program that generates a two dimensional array to make matrix and a vector of random numbers and perform multiplication. I can't figure out whats wrong with my code. It generates a matrix of random numbers but all the numbers in the vector array is same and so is the... (2 Replies)
i want to generate a random number through a script, and even if anyone reads the script, they wont be able to figure out what the random number is. only the person who setup the script would know it.
something like this could work: random
the full thread is here:
... (13 Replies)
Need to use dd to generate a large file from a sample file of random data. This is because I don't have /dev/urandom.
I create a named pipe then:
dd if=mynamed.fifo do=myfile.fifo bs=1024 count=1024
but when I cat a file to the fifo that's 1024 random bytes:
cat randomfile.txt >... (7 Replies)
Hi,
Is anybody experience generate a pair of random number by using awk command?
I wanna to generate a pair of random number (range from 1 to 4124) and repeats it 416 times.
Desired output
2 326
123 1256
341 14
3245 645
.
.
.
I did write the below command:
awk... (5 Replies)
Discussion started by: perl_beginner
5 Replies
LEARN ABOUT DEBIAN
makepasswd
makepasswd(1) UNIX Reference Manual makepasswd(1)NAME
makepasswd - generate and/or encrypt passwords
SYNOPSIS
makepasswd [ --chars N ] [ --clearfrom file ] [ --count N ] [ --crypt | --nocrypt | --crypt-md5 ] [ --cryptsalt N ] [ --help ] [ --maxchars
N ] [ --minchars N ] [ --randomseed N ] [ --rerandom N ] [ --repeatpass N ] [ --string string ] [ --verbose | --noverbose ]
DESCRIPTION
makepasswd generates true random passwords using /dev/urandom, with the emphasis on security over pronounceability. It can also encrypt
plaintext passwords given on the command line.
OPTIONS --chars N
Generate passwords with exactly N characters (do not use with options --minchars and --maxchars).
--clearfrom FILE
Use password from FILE instead of generating passwords. Requires the --crypt or the --crypt-md5 options; may not be used with these
options: --chars, --maxchars, --minchars, --count, --string, --nocrypt. Trailing newlines are removed but other white space is not.
--count N
Produce a total of N passwords (the default is one).
--crypt
Produce encrypted passwords.
--crypt-md5
Produce encrypted passwords using the MD5 digest (hash) algorithm.
--cryptsalt N
Use crypt() salt N, a positive number <= 4096. If random seeds are desired, specify a zero value (the default).
--help Ignore other operands and produce only a help display.
--maxchars N
Generate passwords with at most N characters (default = 10).
--minchars N
Generate passwords with at least N characters (default = 8).
--nocrypt
Do not encrypt the generated password(s) (the default).
--noverbose
Display no labels on output (the default).
--randomseed N
Use random number seed N, between 0 and 2^32 inclusive. A zero value results in a real-random seed. This generates much less
secure passwords than the default; not only does it generate predictable passwords due to the fixed seed, but the range of available
seeds is 32 bits rather than the default of 256 bits, and cannot be changed without breaking expectations of previous users of this
option. If possible, do not use this option.
--rerandom N
Set the random seed value every N values used. Specify zero to use a single seed value (the default). Specify one to get true-ran-
dom passwords, though note that doing this too frequently will deplete the supply of entropy available in the kernel's entropy pool.
--repeatpass N
Use each password N times (4096 maximum, --crypt must be set and --cryptsalt may not be set).
--string STRING
Use the characters in STRING to generate random passwords.
--verbose
Display labelling information on output.
HISTORY
makepasswd was originally part of the mkircconf program used to centrally administer the Linux Internet Support Cooperative IRC network.
It may potentially be of use in any situation where passwords must be secure and need not be memorized by humans.
Colin Watson modified it to use OpenSSL's pseudo-random number generator.
COPYRIGHT
Copyright (c) 1997-1998 by lilo <lilo@linpeople.org>. All rights are reserved by the author. This program may be used under the terms of
version 2 of the GNU Public License.
SEE ALSO passwd(5)Debian Distribution 1998 February 9 makepasswd(1)