Copy specific text from one file to another

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I have a text file that looks like this:



Start find in flight queries
2018-03-05 15:50:02,069:INFO:######################################
Start find completed queries
2018-03-05 15:50:02,070:INFO:Starting new HTTPS connection (1): server060
2018-03-05 15:50:02,083:DEBUG:"GET /queries?json HTTP/1.1" 401 0
2018-03-05 15:50:02,084:INFO:Resetting dropped connection: server060
2018-03-05 15:50:02,095:DEBUG:"GET /queries?json HTTP/1.1" 200 19059
2018-03-05 15:50:02,099:INFO:######################################
Start find in flight queries


The date and time changes every 5 minutes. I need to copy the very last date and time to another file. In this example its 2018-03-05 15:50:02.
Any suggestions are appreciated. I have used a little regex in the past but not good at it.







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    up vote
    1
    down vote

    favorite
    1












    I have a text file that looks like this:



    Start find in flight queries
    2018-03-05 15:50:02,069:INFO:######################################
    Start find completed queries
    2018-03-05 15:50:02,070:INFO:Starting new HTTPS connection (1): server060
    2018-03-05 15:50:02,083:DEBUG:"GET /queries?json HTTP/1.1" 401 0
    2018-03-05 15:50:02,084:INFO:Resetting dropped connection: server060
    2018-03-05 15:50:02,095:DEBUG:"GET /queries?json HTTP/1.1" 200 19059
    2018-03-05 15:50:02,099:INFO:######################################
    Start find in flight queries


    The date and time changes every 5 minutes. I need to copy the very last date and time to another file. In this example its 2018-03-05 15:50:02.
    Any suggestions are appreciated. I have used a little regex in the past but not good at it.







    share|improve this question
























      up vote
      1
      down vote

      favorite
      1









      up vote
      1
      down vote

      favorite
      1






      1





      I have a text file that looks like this:



      Start find in flight queries
      2018-03-05 15:50:02,069:INFO:######################################
      Start find completed queries
      2018-03-05 15:50:02,070:INFO:Starting new HTTPS connection (1): server060
      2018-03-05 15:50:02,083:DEBUG:"GET /queries?json HTTP/1.1" 401 0
      2018-03-05 15:50:02,084:INFO:Resetting dropped connection: server060
      2018-03-05 15:50:02,095:DEBUG:"GET /queries?json HTTP/1.1" 200 19059
      2018-03-05 15:50:02,099:INFO:######################################
      Start find in flight queries


      The date and time changes every 5 minutes. I need to copy the very last date and time to another file. In this example its 2018-03-05 15:50:02.
      Any suggestions are appreciated. I have used a little regex in the past but not good at it.







      share|improve this question














      I have a text file that looks like this:



      Start find in flight queries
      2018-03-05 15:50:02,069:INFO:######################################
      Start find completed queries
      2018-03-05 15:50:02,070:INFO:Starting new HTTPS connection (1): server060
      2018-03-05 15:50:02,083:DEBUG:"GET /queries?json HTTP/1.1" 401 0
      2018-03-05 15:50:02,084:INFO:Resetting dropped connection: server060
      2018-03-05 15:50:02,095:DEBUG:"GET /queries?json HTTP/1.1" 200 19059
      2018-03-05 15:50:02,099:INFO:######################################
      Start find in flight queries


      The date and time changes every 5 minutes. I need to copy the very last date and time to another file. In this example its 2018-03-05 15:50:02.
      Any suggestions are appreciated. I have used a little regex in the past but not good at it.









      share|improve this question













      share|improve this question




      share|improve this question








      edited Mar 5 at 21:14

























      asked Mar 5 at 21:00









      user3508766

      447




      447




















          2 Answers
          2






          active

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          up vote
          2
          down vote



          accepted










          tac + grep solution:



          tac input.txt | grep -Eo -m1 '^[0-9]4(-[0-9]2)2 [0-9]2(:[0-9]2)2' > last_date.txt





          share|improve this answer
















          • 1




            excellent! Is there something you used to help you figuring this out so quickly?
            – user3508766
            Mar 5 at 21:10










          • @user3508766, yes, I use my mind )
            – RomanPerekhrest
            Mar 5 at 21:11










          • haha very good, spasibo bolshoe
            – user3508766
            Mar 5 at 21:12










          • @user3508766, you are welcome!
            – RomanPerekhrest
            Mar 5 at 21:14

















          up vote
          1
          down vote













          Using awk without pipes ;)



          awk -F'[ ,]' '
          /^[0-9]4-[0-9]2-[0-9]2s+[0-9]2:[0-9]2:[0-9]2/
          var=$1" "$2
          ENDprint var
          ' file





          share|improve this answer




















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            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            2
            down vote



            accepted










            tac + grep solution:



            tac input.txt | grep -Eo -m1 '^[0-9]4(-[0-9]2)2 [0-9]2(:[0-9]2)2' > last_date.txt





            share|improve this answer
















            • 1




              excellent! Is there something you used to help you figuring this out so quickly?
              – user3508766
              Mar 5 at 21:10










            • @user3508766, yes, I use my mind )
              – RomanPerekhrest
              Mar 5 at 21:11










            • haha very good, spasibo bolshoe
              – user3508766
              Mar 5 at 21:12










            • @user3508766, you are welcome!
              – RomanPerekhrest
              Mar 5 at 21:14














            up vote
            2
            down vote



            accepted










            tac + grep solution:



            tac input.txt | grep -Eo -m1 '^[0-9]4(-[0-9]2)2 [0-9]2(:[0-9]2)2' > last_date.txt





            share|improve this answer
















            • 1




              excellent! Is there something you used to help you figuring this out so quickly?
              – user3508766
              Mar 5 at 21:10










            • @user3508766, yes, I use my mind )
              – RomanPerekhrest
              Mar 5 at 21:11










            • haha very good, spasibo bolshoe
              – user3508766
              Mar 5 at 21:12










            • @user3508766, you are welcome!
              – RomanPerekhrest
              Mar 5 at 21:14












            up vote
            2
            down vote



            accepted







            up vote
            2
            down vote



            accepted






            tac + grep solution:



            tac input.txt | grep -Eo -m1 '^[0-9]4(-[0-9]2)2 [0-9]2(:[0-9]2)2' > last_date.txt





            share|improve this answer












            tac + grep solution:



            tac input.txt | grep -Eo -m1 '^[0-9]4(-[0-9]2)2 [0-9]2(:[0-9]2)2' > last_date.txt






            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Mar 5 at 21:06









            RomanPerekhrest

            22.4k12144




            22.4k12144







            • 1




              excellent! Is there something you used to help you figuring this out so quickly?
              – user3508766
              Mar 5 at 21:10










            • @user3508766, yes, I use my mind )
              – RomanPerekhrest
              Mar 5 at 21:11










            • haha very good, spasibo bolshoe
              – user3508766
              Mar 5 at 21:12










            • @user3508766, you are welcome!
              – RomanPerekhrest
              Mar 5 at 21:14












            • 1




              excellent! Is there something you used to help you figuring this out so quickly?
              – user3508766
              Mar 5 at 21:10










            • @user3508766, yes, I use my mind )
              – RomanPerekhrest
              Mar 5 at 21:11










            • haha very good, spasibo bolshoe
              – user3508766
              Mar 5 at 21:12










            • @user3508766, you are welcome!
              – RomanPerekhrest
              Mar 5 at 21:14







            1




            1




            excellent! Is there something you used to help you figuring this out so quickly?
            – user3508766
            Mar 5 at 21:10




            excellent! Is there something you used to help you figuring this out so quickly?
            – user3508766
            Mar 5 at 21:10












            @user3508766, yes, I use my mind )
            – RomanPerekhrest
            Mar 5 at 21:11




            @user3508766, yes, I use my mind )
            – RomanPerekhrest
            Mar 5 at 21:11












            haha very good, spasibo bolshoe
            – user3508766
            Mar 5 at 21:12




            haha very good, spasibo bolshoe
            – user3508766
            Mar 5 at 21:12












            @user3508766, you are welcome!
            – RomanPerekhrest
            Mar 5 at 21:14




            @user3508766, you are welcome!
            – RomanPerekhrest
            Mar 5 at 21:14












            up vote
            1
            down vote













            Using awk without pipes ;)



            awk -F'[ ,]' '
            /^[0-9]4-[0-9]2-[0-9]2s+[0-9]2:[0-9]2:[0-9]2/
            var=$1" "$2
            ENDprint var
            ' file





            share|improve this answer
























              up vote
              1
              down vote













              Using awk without pipes ;)



              awk -F'[ ,]' '
              /^[0-9]4-[0-9]2-[0-9]2s+[0-9]2:[0-9]2:[0-9]2/
              var=$1" "$2
              ENDprint var
              ' file





              share|improve this answer






















                up vote
                1
                down vote










                up vote
                1
                down vote









                Using awk without pipes ;)



                awk -F'[ ,]' '
                /^[0-9]4-[0-9]2-[0-9]2s+[0-9]2:[0-9]2:[0-9]2/
                var=$1" "$2
                ENDprint var
                ' file





                share|improve this answer












                Using awk without pipes ;)



                awk -F'[ ,]' '
                /^[0-9]4-[0-9]2-[0-9]2s+[0-9]2:[0-9]2:[0-9]2/
                var=$1" "$2
                ENDprint var
                ' file






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Mar 5 at 21:30









                Gilles Quenot

                15.3k13448




                15.3k13448






















                     

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