bash从网页显示日期和时间值

Question

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我只想提取日期和时间值。04/05/2015 11:18 AM

我曾经使用过grep，sed，cat |猫，但他们没有工作。谢谢

Answer 1

$ grep -Eo '([[:digit:]]{2}/){2}[[:digit:]]{4} [[:digit:]]{2}:[[:digit:]]{2}[AP]M' file
04/05/2015 11:18AM

或：

$ sed -nr 's|.*(([[:digit:]]{2}/){2}[[:digit:]]{4} [[:digit:]]{2}:[[:digit:]]{2}[AP]M).*|1|p' file
04/05/2015 11:18AM