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Thread: crunch 2.4

  1. #11
    Very good friend of the forum Gitsnik's Avatar
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    Default Re: crunch 2.4

    Quote Originally Posted by bofh28 View Post
    Running crunch outside of X should be the fastest way to run crunch. I don't have the time to test right now but I will add it to the todo list.
    The > /dev/null is the killer. Inside a terminal, if I'm reading between the lines correctly, the individual in question is running into a purely display-buffer bottleneck, in much the same way one would find a slower crunch time onto a 5400rpm disk vs a 7200rpm disk. The only reason the software itself should run slow is pure CPU cycles, until you start either writing it to stdout/stderr, or to a disk/network. Inbuilt cracking should be fine, but generating any kind of visual list would slow things down significantly.

    I could be firing from the left field though, in which case write it off as a bit of random knowledge transferred
    Still not underestimating the power...

    There is no such thing as bad information - There is truth in the data, so you sift it all, even the crap stuff.

  2. #12
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    Default Re: crunch 2.4

    Quote Originally Posted by Gitsnik View Post
    The > /dev/null is the killer. Inside a terminal, if I'm reading between the lines correctly, the individual in question is running into a purely display-buffer bottleneck, in much the same way one would find a slower crunch time onto a 5400rpm disk vs a 7200rpm
    Actually the display buffer bottleneck is exactly the issue I was thinking of when I posted the >/dev/null to eliminate that bottleneck. I ran into the buffer bottleneck several times when I was benchmarking crunch. I now use -o for benchmarking. Yeah I am IO bound now but I do have 7200rpm SCSI disks. However I am just making sure that I don't slow down crunch too much from the original version.
    I like the bleeding edge, but I don't like blood loss

  3. #13
    Just burned his ISO
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    Default Re: crunch 2.4

    How do I install this after download? (just switched from Windows to Linux)

  4. #14
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    Default Re: crunch 2.4

    People like to see the progress of file crunching, an ooh ahh thing I guess.

    Maybe writing to display less of the available info may reduce the bottleneck and help to improve performance.

  5. #15
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    Default Re: crunch 2.4

    I won't be adding a progress bar because:
    1) writing to display takes time, granted a small amount of time but still
    2) they is no way to estimate how long a task will take
    3) People can open a second terminal window and do a ls to see what has been done

    I just do a:
    time ./crunch 1 5
    to test for bottlenecks
    of course this should be done outside X and preferable in single user mode
    I like the bleeding edge, but I don't like blood loss

  6. #16
    Just burned his ISO MotherRuss1a's Avatar
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    Thumbs up Re: crunch 2.4

    Great tool, If i want to creat a wordlist with following word "BiscottE" what is the easy and fast way?
    The first and the last letter is upercase.
    Thanks

  7. #17
    Just burned his ISO MotherRuss1a's Avatar
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    Post Re: crunch 2.4

    For bofh28

    Suggestion

    Hi, i was a windows user and recently moved to Linux and became a big fan.
    In relation to backtrack and the tools available as crunch i think is an excellent
    work. HAIL to the creators and developers.
    About crunch if I may, whant to submit an idea to you create a symbol just for upercase letters.
    eg . /crunch 8 8 mixalpha -t §@@@@@@§


    @ = Lowercase
    § = Upercase

  8. #18
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    Default Re: crunch 2.4

    Quote Originally Posted by MotherRuss1a View Post
    For bofh28

    Suggestion

    Hi, i was a windows user and recently moved to Linux and became a big fan.
    In relation to backtrack and the tools available as crunch i think is an excellent
    work. HAIL to the creators and developers.
    About crunch if I may, whant to submit an idea to you create a symbol just for upercase letters.
    eg . /crunch 8 8 mixalpha -t §@@@@@@§


    @ = Lowercase
    § = Upercase
    Crunch 2.5 has a uppercase symbol. I haven't released 2.5 yet as I have to get some code to work and I haven't had much time for crunch lately.
    I like the bleeding edge, but I don't like blood loss

  9. #19
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    Default Re: crunch 2.4

    Quote Originally Posted by JellyBelly View Post
    People like to see the progress of file crunching, an ooh ahh thing I guess.

    Maybe writing to display less of the available info may reduce the bottleneck and help to improve performance.
    I thought it over and I think I might do what john does. If you press the space bar you see what is being generated. If I can figure out how to calculate the number of possible combinations or permutations there will be I could print something like:
    output: wxyz 2345 of 30406

    This won't be in 2.5 maybe 2.6.
    I like the bleeding edge, but I don't like blood loss

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