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December 9, 2016 08:24
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how to grep docker log
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| docker logs nginx 2>&1 | grep "127." | |
| # ref: http://stackoverflow.com/questions/34724980/finding-a-string-in-docker-logs-of-container |
excellent！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！ You are the one who knows "2>&1" well.
if you get "grep: (standard input): binary file matches" error, when doing e.g. --since=48h, try this:
docker logs nginx 2>&1 | grep -a "127."
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