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Combines wgzhao's grep | awk | sed into one awk command.
There are 10 alternatives - vote for the best!
I've been using it in a script to build from scratch proxy servers.
Simple and easy. No regex, no search and replace. Just clean, built-in tools.
only output the ip addres. I put double pipe with sed because not parse with operator OR (|) in redex.
If you can do better, submit your command here.
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