How can I use grep in a loop and add new line of text each time to the same file?

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I am trying to use grep in a loop and extract data from many files and then save them in a text file. Currently when I write



grep sth > test.txt


It writes it in the file test.txt, but when I run the same code it will not add the text to the end of the previously saved text, it overwrites it. What can I do?






shell-script shell grep







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    I am trying to use grep in a loop and extract data from many files and then save them in a text file. Currently when I write



    grep sth > test.txt


    It writes it in the file test.txt, but when I run the same code it will not add the text to the end of the previously saved text, it overwrites it. What can I do?






    shell-script shell grep







    share|improve this question







    New contributor




    emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
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      down vote

      favorite









      up vote
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      down vote

      favorite











      I am trying to use grep in a loop and extract data from many files and then save them in a text file. Currently when I write



      grep sth > test.txt


      It writes it in the file test.txt, but when I run the same code it will not add the text to the end of the previously saved text, it overwrites it. What can I do?






      shell-script shell grep







      share|improve this question







      New contributor




      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I am trying to use grep in a loop and extract data from many files and then save them in a text file. Currently when I write



      grep sth > test.txt


      It writes it in the file test.txt, but when I run the same code it will not add the text to the end of the previously saved text, it overwrites it. What can I do?






      shell-script shell grep




      shell-script shell grep






      share|improve this question







      New contributor




      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







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      emad1234 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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          You need >>



          > overwrites the data in a file whereas >> appends the data to the end of the file.



          I'm going to assume that you have some foles that you are getting from



          grep sth /path/to/files/* >> test.txt




          share




















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            You need >>



            > overwrites the data in a file whereas >> appends the data to the end of the file.



            I'm going to assume that you have some foles that you are getting from



            grep sth /path/to/files/* >> test.txt




            share
























              up vote
              0
              down vote













              You need >>



              > overwrites the data in a file whereas >> appends the data to the end of the file.



              I'm going to assume that you have some foles that you are getting from



              grep sth /path/to/files/* >> test.txt




              share






















                up vote
                0
                down vote










                up vote
                0
                down vote









                You need >>



                > overwrites the data in a file whereas >> appends the data to the end of the file.



                I'm going to assume that you have some foles that you are getting from



                grep sth /path/to/files/* >> test.txt




                share












                You need >>



                > overwrites the data in a file whereas >> appends the data to the end of the file.



                I'm going to assume that you have some foles that you are getting from



                grep sth /path/to/files/* >> test.txt





                share











                share


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                answered 4 mins ago









                Nasir Riley

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