Replace the first word of every line in a file with the line number

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0















If I have a file like this:



foo bar
bar foo
5 foo
bar 5


and I want to change the file to look like this:



1 bar
2 foo
3 foo
4 5


How can I go about doing this?










share|improve this question




























    0















    If I have a file like this:



    foo bar
    bar foo
    5 foo
    bar 5


    and I want to change the file to look like this:



    1 bar
    2 foo
    3 foo
    4 5


    How can I go about doing this?










    share|improve this question


























      0












      0








      0








      If I have a file like this:



      foo bar
      bar foo
      5 foo
      bar 5


      and I want to change the file to look like this:



      1 bar
      2 foo
      3 foo
      4 5


      How can I go about doing this?










      share|improve this question
















      If I have a file like this:



      foo bar
      bar foo
      5 foo
      bar 5


      and I want to change the file to look like this:



      1 bar
      2 foo
      3 foo
      4 5


      How can I go about doing this?







      text-processing sed






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Jan 24 at 1:44









      Jeff Schaller

      41.3k1056131




      41.3k1056131










      asked Jan 24 at 1:09









      ComfyComfy

      31




      31




















          1 Answer
          1






          active

          oldest

          votes


















          3














          How about Awk?



          $ awk '$1 = FNR 1' file
          1 bar
          2 foo
          3 foo
          4 5





          share|improve this answer






















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            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            3














            How about Awk?



            $ awk '$1 = FNR 1' file
            1 bar
            2 foo
            3 foo
            4 5





            share|improve this answer



























              3














              How about Awk?



              $ awk '$1 = FNR 1' file
              1 bar
              2 foo
              3 foo
              4 5





              share|improve this answer

























                3












                3








                3







                How about Awk?



                $ awk '$1 = FNR 1' file
                1 bar
                2 foo
                3 foo
                4 5





                share|improve this answer













                How about Awk?



                $ awk '$1 = FNR 1' file
                1 bar
                2 foo
                3 foo
                4 5






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Jan 24 at 1:15









                steeldriversteeldriver

                36.1k35286




                36.1k35286



























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