Grep log file greater than time stamp

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半阙折子戏
半阙折子戏 2021-01-04 11:04

I have a unix log file(application.log), that has logs with timestamp at the starting. I need to search for a pattern \"sent\" in this log file greater than time 2014-03-20

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  • 2021-01-04 11:43

    Try:

    sed -n '/^2014-03-20 14:05:54/,$ {/sent/p;}' file
    

    Note: This assumes that there is at least 1 line in your log file that actually starts with 2014-03-20 14:05:54 and that it's OK to include matches from that second in time.

    If the existence of such a line is not guaranteed, @shellter's awk approach is superior; to put it together:

    awk '$0 > "2014-03-20 14:05:54" && $0 ~ "sent"' file
    
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  • 2021-01-04 11:46

    I added 2 more records to the test data to ensure this is really working:

    2014-03-19 14:05:53,999 [NfxAgent....
    2014-03-20 14:05:53,164 [NfxAgent....
    

    But I don't think you can use grep for this. Here is an awk solution:

    $ grep sent  grepTest_20140321.txt|  awk '$0 > "2014-03-20 14:05:54"' 
    2014-03-20 14:05:54,038 [NfxAgent....
    2014-03-20 14:05:54,164 [NfxAgent....
    2014-03-20 14:05:54,298 [NfxAgent....
    2014-03-20 14:05:54,414 [NfxAgent....
    2014-03-20 14:05:54,787 [NfxAgent....
    

    edit

    "What if we need to specify the end time in the same format like 2014-03-21 10:04:14,018?"

    And I've added 3 lines of test data to confirm the 2nd case:

    2014-03-21 10:04:14,017 [NfxAgent....
    2014-03-21 10:04:14,018 [NfxAgent....
    2014-03-22 10:04:14,999 [NfxAgent....
    

    Result shows one new record in the range you've specified.

     awk '$0 ~ "sent" && $0 > "2014-03-20 14:05:54" && $0 < "2014-03-21 10:04:14,018"'    grepTest_20140321.txt
    2014-03-20 14:05:54,038 [NfxAgent....
    2014-03-20 14:05:54,164 [NfxAgent....
    2014-03-20 14:05:54,298 [NfxAgent....
    2014-03-20 14:05:54,414 [NfxAgent....
    2014-03-20 14:05:54,787 [NfxAgent....
    2014-03-21 10:04:14,017 [NfxAgent....
    

    IHTH

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