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So I am stuck here:

grep -E '^....c...c...$' shows all words with the expr I need. Now from this words I only need the ones that don't have a x.

Who can help me?

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1 Answer

up vote 5 down vote accepted

Use a second grep:

grep -E '^....c...c...$' | grep -v x

Or character classes:

grep -E '^[^x][^x][^x][^x]c[^x][^x][^x]c[^x][^x][^x]$'
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ok that is the answer –  bluewhile Nov 25 '12 at 18:21
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