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Date: Fri, 23 Oct 2015 21:49:48 +0200
From: magnum <>
Subject: Re: "Illegal instruction" error on

On 2015-10-23 15:11, swaaag wrote:
> I have [linux-gnu 64-bit AVX-autoconf] running
> on Kali 4.0.0. (x86_64).
> When I try to run a command:
> john --wordlist=/passwords.txt --rules --stdout > output.txt
> I get "Illegal instruction" error.
> I researched for hours last night and read FAQ and was still unable to
> resolve the issue. Could someone provide me some guidance as to how I can
> troubleshoot this error and fix it?

Just a guess: Your CPU doesn't have AVX support and whoever made that 
Kali package should have produced an SSE2 binary, or provided fallback 

If you're not sure about your CPU, try this:

	grep -q avx /proc/cpuinfo && echo Yep || echo Nope

If I'm right you should report it to Kali developers as a bug (unless 
someone already did - is this the latest Kali?).


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