replace first semicolon occurence

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Hi I have a logfile and I want to replace the first semicolon occurence, like:



head1;head2;head3;head4;head5 
blabb;blabl;;blab;blabl;;bla


Desired output:



 head1;head2;head3;head4;head5 
 blabb;blabl;blab;blabl;;bla


With regular expression how can select the first occurrence and replace for ";"
I have the next command in sed:



sed -i 's/;;/;/g'


but this one replace all the occurrences file. Is there another way to do?






sed regular-expression tr







share|improve this question

























    up vote
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    down vote

    favorite












    Hi I have a logfile and I want to replace the first semicolon occurence, like:



    head1;head2;head3;head4;head5 
    blabb;blabl;;blab;blabl;;bla


    Desired output:



     head1;head2;head3;head4;head5 
     blabb;blabl;blab;blabl;;bla


    With regular expression how can select the first occurrence and replace for ";"
    I have the next command in sed:



    sed -i 's/;;/;/g'


    but this one replace all the occurrences file. Is there another way to do?






    sed regular-expression tr







    share|improve this question























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Hi I have a logfile and I want to replace the first semicolon occurence, like:



      head1;head2;head3;head4;head5 
      blabb;blabl;;blab;blabl;;bla


      Desired output:



       head1;head2;head3;head4;head5 
       blabb;blabl;blab;blabl;;bla


      With regular expression how can select the first occurrence and replace for ";"
      I have the next command in sed:



      sed -i 's/;;/;/g'


      but this one replace all the occurrences file. Is there another way to do?






      sed regular-expression tr







      share|improve this question













      Hi I have a logfile and I want to replace the first semicolon occurence, like:



      head1;head2;head3;head4;head5 
      blabb;blabl;;blab;blabl;;bla


      Desired output:



       head1;head2;head3;head4;head5 
       blabb;blabl;blab;blabl;;bla


      With regular expression how can select the first occurrence and replace for ";"
      I have the next command in sed:



      sed -i 's/;;/;/g'


      but this one replace all the occurrences file. Is there another way to do?






      sed regular-expression tr




      sed regular-expression tr






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 12 mins ago









      Mareyes

      13611




      13611




















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          To make the substitution only act once, remove the /g modifier:



          s/;;/;/




          share




















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            up vote
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            To make the substitution only act once, remove the /g modifier:



            s/;;/;/




            share
























              up vote
              1
              down vote













              To make the substitution only act once, remove the /g modifier:



              s/;;/;/




              share






















                up vote
                1
                down vote










                up vote
                1
                down vote









                To make the substitution only act once, remove the /g modifier:



                s/;;/;/




                share












                To make the substitution only act once, remove the /g modifier:



                s/;;/;/





                share











                share


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                answered 6 mins ago









                choroba

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