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how to remove a specific line in bash/linux?


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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}







0















say I am given this file



username1
username2
username3


I want to delete a line that contains something I say. Like for example:



$ deletestuff abovefile username2
$ cat file
username1
username3









share|improve this question































    0















    say I am given this file



    username1
    username2
    username3


    I want to delete a line that contains something I say. Like for example:



    $ deletestuff abovefile username2
    $ cat file
    username1
    username3









    share|improve this question



























      0












      0








      0








      say I am given this file



      username1
      username2
      username3


      I want to delete a line that contains something I say. Like for example:



      $ deletestuff abovefile username2
      $ cat file
      username1
      username3









      share|improve this question














      say I am given this file



      username1
      username2
      username3


      I want to delete a line that contains something I say. Like for example:



      $ deletestuff abovefile username2
      $ cat file
      username1
      username3






      linux






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 3 hours ago









      Tree GarenTree Garen

      1102 bronze badges




      1102 bronze badges

























          1 Answer
          1






          active

          oldest

          votes


















          1
















          Use sed -i to edit in place. /regexp/d deletes lines matching regexp.



          sed -i /username2/d file


          To match whole lines (so that, for example, username222 is not also removed) use ^ and $ to anchor the search to start and end of the line.



          sed -i '/^username2$/d' file





          share|improve this answer




























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            1 Answer
            1






            active

            oldest

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            active

            oldest

            votes






            active

            oldest

            votes









            1
















            Use sed -i to edit in place. /regexp/d deletes lines matching regexp.



            sed -i /username2/d file


            To match whole lines (so that, for example, username222 is not also removed) use ^ and $ to anchor the search to start and end of the line.



            sed -i '/^username2$/d' file





            share|improve this answer






























              1
















              Use sed -i to edit in place. /regexp/d deletes lines matching regexp.



              sed -i /username2/d file


              To match whole lines (so that, for example, username222 is not also removed) use ^ and $ to anchor the search to start and end of the line.



              sed -i '/^username2$/d' file





              share|improve this answer




























                1














                1










                1









                Use sed -i to edit in place. /regexp/d deletes lines matching regexp.



                sed -i /username2/d file


                To match whole lines (so that, for example, username222 is not also removed) use ^ and $ to anchor the search to start and end of the line.



                sed -i '/^username2$/d' file





                share|improve this answer













                Use sed -i to edit in place. /regexp/d deletes lines matching regexp.



                sed -i /username2/d file


                To match whole lines (so that, for example, username222 is not also removed) use ^ and $ to anchor the search to start and end of the line.



                sed -i '/^username2$/d' file






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 3 hours ago









                Oh My GoodnessOh My Goodness

                4203 silver badges8 bronze badges




                4203 silver badges8 bronze badges


































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