Firstly, you replied to the wrong node. You should have replied to moritz's node.

Secondly, that looks like correct grep syntax to me. I bet that your 'access' file does not have a line with both MOD and DEL in it, something like: 

foo DEL bar MOD goo

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In reply to Re^3: what is grep command for and condition by toolic
in thread OT: what is grep command for and condition by anakin30

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