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Date: Tue, 9 Jul 2019 09:45:07 -0300
From: Claudio André <>
Subject: Re: Disable specific SIMD features like AVX, AVX2, etc.

> An easier approach you may use is a script like this (call it "john"):
> ---
> #!/bin/sh
> for john in john-avx512bw john-avx2 john-avx john-sse4 john-ssse3
john-sse2; do
> if ./$john | grep -q ^Usage:; then
> echo "Will use $john"
> ln -sf $john john
> exec ./john "$@"
> exit
> fi
> done
> echo 'No suitable john binary found'

You can also add the script to your entrypoint. I added it my image (where
I don't use a fallback binary chain):
docker run -it claudioandre/john:v1.9.0J2 best --test=10

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