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./crunch <min-len> <max-len> [charset]

e.g: ./crunch 3 7 abcdef

This example will compute all passwords between 3 and 7 chars using 'abcdef' as the character set and dump it to stdout.


./crunch <from-len> <to-len> [-f <path to charset.lst> charset-name] [-o wordlist.txt or START] [-t [FIXED]@@@@] [-s startblock]



maximum bytes to write to output file. depending on the blocksize files may be some bytes smaller than specified but never bigger.


numbers of lines to write to output file, only works if "-o START" is used, eg: 60 The output files will be in the format of starting letter - ending letter for example: crunch 1 5 -f /pentest/password/charset.lst mixalpha -o START -c 52 will result in 2 files: a-7.txt and 8-\ .txt The reason for the slash in the second filename is the ending character is space and ls has to escape it to print it. Yes you will need to put in the \ when specifying the filename.


specify -d [n][@,%^] to suppress generation of strings with more than [n] adjacent duplicates from the given character set. For example: ./crunch 5 5 -d 2@ Will print all combinations with 2 or less adjacent lowercase duplicates.


tells crunch to stop generating words at string. Useful when piping crunch to another program.


path to a file containing a list of character sets, eg: charset.lst name of the character set in the above file eg: mixalpha-numeric-all-space


inverts the output so the first character will change very often


literal characters to use in -t @,%^


allows you to specify the file to write the output to, eg: wordlist.txt


prints permutations without repeating characters. This option CANNOT be used with -s. It also ignores min and max lengths.


Like the -p option except it reads the strings from the specified file. It CANNOT be used with -s. It also ignores min and max.


resume a previous session. You must use the same command line as the previous session.


allows you to specify the starting string, eg: 03god22fs

-t [FIXED]@,%^

allows you to specify a pattern, eg: @@god@@@@ where the only the @'s will change with lowercase letters the ,'s will change with uppercase letters the %'s will change with numbers the ^'s will change with symbols


The -u option disables the printpercentage thread. This should be the last option.


adds support to compress the generated output. Must be used with -o option. Only supports gzip, bzip, lzma, and 7z.

This code can be easily adapted for use in brute-force attacks against network services or cryptography.

Compiles on: linux 32 and 64 bit Ubuntu for sure, 32 and 64 bit Linux in general works. I have received word that crunch compiles on MacOS. It should compile on freebsd and the other Unix and Linux OSs but I don't don't have access to any of the those systems. Please let me know.

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