how to capture specific strings from line

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











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how to capture only the sdX from the following line ( withe bash/awk/sed/perl one liner )



echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","


expected output



sdb
sdc
sdd
sde
sdf






share|improve this question


























    up vote
    1
    down vote

    favorite












    how to capture only the sdX from the following line ( withe bash/awk/sed/perl one liner )



    echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","


    expected output



    sdb
    sdc
    sdd
    sde
    sdf






    share|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      how to capture only the sdX from the following line ( withe bash/awk/sed/perl one liner )



      echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","


      expected output



      sdb
      sdc
      sdd
      sde
      sdf






      share|improve this question














      how to capture only the sdX from the following line ( withe bash/awk/sed/perl one liner )



      echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","


      expected output



      sdb
      sdc
      sdd
      sde
      sdf








      share|improve this question













      share|improve this question




      share|improve this question








      edited Dec 22 '17 at 12:02









      FaxMax

      423219




      423219










      asked Dec 22 '17 at 9:48









      yael

      2,0091145




      2,0091145




















          5 Answers
          5






          active

          oldest

          votes

















          up vote
          2
          down vote



          accepted










          You can use GREP arguments:



           -P, --perl-regexp
          Interpret the pattern as a Perl-compatible regular expression
          (PCRE). This is experimental and grep -P may warn of
          unimplemented features.
          -o, --only-matching
          Print only the matched (non-empty) parts of a matching line,
          with each such part on a separate output line.


          So your command would be:



          echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | grep -oP "w*sdw*"
          sdb
          sdc
          sdd
          sde
          sdf





          share|improve this answer


















          • 1




            Sorry, you talk about the option -P and the you use -h to hide the filename? grep is (in this case) reading from stdin
            – FaxMax
            Dec 22 '17 at 10:48











          • Corrected, wrong copy/paste. Thanks.
            – Kevin Lemaire
            Dec 22 '17 at 10:52

















          up vote
          1
          down vote













          Use



          echo ... | grep -Eo "sd[a-z]"


          where -E interprets the pattern as an (extended) regular expression and -o prints only the matching parts in each line.






          share|improve this answer



























            up vote
            0
            down vote













            You did not specify what x should be in sdX so one could as well assume that it might be any character:



            $ echo echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs /data"," | grep -o 'sd.'
            sdb
            sdc
            sdd
            sde
            sdf


            A literal . means any character in regular expressions.



            And in perl because you wanted that explicitly:



            $ echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | perl -nE 'say $& while /sd./g'
            sdb
            sdc
            sdd
            sde
            sdf





            share|improve this answer





























              up vote
              0
              down vote













              Above result is achieved by awk one liner




               echo " ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","" | sed "s/,/n/g" | awk -F "/" 'print $3' | sed '/^$/d'



              output




              sdb
              sdc
              sdd
              sde
              sdf








              share|improve this answer



























                up vote
                -1
                down vote













                echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' 
                "dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",
                echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' | grep -Po 'sdw'
                sdb
                sdc
                sdd
                sde
                sdf





                share|improve this answer




















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                  5 Answers
                  5






                  active

                  oldest

                  votes








                  5 Answers
                  5






                  active

                  oldest

                  votes









                  active

                  oldest

                  votes






                  active

                  oldest

                  votes








                  up vote
                  2
                  down vote



                  accepted










                  You can use GREP arguments:



                   -P, --perl-regexp
                  Interpret the pattern as a Perl-compatible regular expression
                  (PCRE). This is experimental and grep -P may warn of
                  unimplemented features.
                  -o, --only-matching
                  Print only the matched (non-empty) parts of a matching line,
                  with each such part on a separate output line.


                  So your command would be:



                  echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | grep -oP "w*sdw*"
                  sdb
                  sdc
                  sdd
                  sde
                  sdf





                  share|improve this answer


















                  • 1




                    Sorry, you talk about the option -P and the you use -h to hide the filename? grep is (in this case) reading from stdin
                    – FaxMax
                    Dec 22 '17 at 10:48











                  • Corrected, wrong copy/paste. Thanks.
                    – Kevin Lemaire
                    Dec 22 '17 at 10:52














                  up vote
                  2
                  down vote



                  accepted










                  You can use GREP arguments:



                   -P, --perl-regexp
                  Interpret the pattern as a Perl-compatible regular expression
                  (PCRE). This is experimental and grep -P may warn of
                  unimplemented features.
                  -o, --only-matching
                  Print only the matched (non-empty) parts of a matching line,
                  with each such part on a separate output line.


                  So your command would be:



                  echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | grep -oP "w*sdw*"
                  sdb
                  sdc
                  sdd
                  sde
                  sdf





                  share|improve this answer


















                  • 1




                    Sorry, you talk about the option -P and the you use -h to hide the filename? grep is (in this case) reading from stdin
                    – FaxMax
                    Dec 22 '17 at 10:48











                  • Corrected, wrong copy/paste. Thanks.
                    – Kevin Lemaire
                    Dec 22 '17 at 10:52












                  up vote
                  2
                  down vote



                  accepted







                  up vote
                  2
                  down vote



                  accepted






                  You can use GREP arguments:



                   -P, --perl-regexp
                  Interpret the pattern as a Perl-compatible regular expression
                  (PCRE). This is experimental and grep -P may warn of
                  unimplemented features.
                  -o, --only-matching
                  Print only the matched (non-empty) parts of a matching line,
                  with each such part on a separate output line.


                  So your command would be:



                  echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | grep -oP "w*sdw*"
                  sdb
                  sdc
                  sdd
                  sde
                  sdf





                  share|improve this answer














                  You can use GREP arguments:



                   -P, --perl-regexp
                  Interpret the pattern as a Perl-compatible regular expression
                  (PCRE). This is experimental and grep -P may warn of
                  unimplemented features.
                  -o, --only-matching
                  Print only the matched (non-empty) parts of a matching line,
                  with each such part on a separate output line.


                  So your command would be:



                  echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | grep -oP "w*sdw*"
                  sdb
                  sdc
                  sdd
                  sde
                  sdf






                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Dec 22 '17 at 11:04

























                  answered Dec 22 '17 at 10:41









                  Kevin Lemaire

                  1,037421




                  1,037421







                  • 1




                    Sorry, you talk about the option -P and the you use -h to hide the filename? grep is (in this case) reading from stdin
                    – FaxMax
                    Dec 22 '17 at 10:48











                  • Corrected, wrong copy/paste. Thanks.
                    – Kevin Lemaire
                    Dec 22 '17 at 10:52












                  • 1




                    Sorry, you talk about the option -P and the you use -h to hide the filename? grep is (in this case) reading from stdin
                    – FaxMax
                    Dec 22 '17 at 10:48











                  • Corrected, wrong copy/paste. Thanks.
                    – Kevin Lemaire
                    Dec 22 '17 at 10:52







                  1




                  1




                  Sorry, you talk about the option -P and the you use -h to hide the filename? grep is (in this case) reading from stdin
                  – FaxMax
                  Dec 22 '17 at 10:48





                  Sorry, you talk about the option -P and the you use -h to hide the filename? grep is (in this case) reading from stdin
                  – FaxMax
                  Dec 22 '17 at 10:48













                  Corrected, wrong copy/paste. Thanks.
                  – Kevin Lemaire
                  Dec 22 '17 at 10:52




                  Corrected, wrong copy/paste. Thanks.
                  – Kevin Lemaire
                  Dec 22 '17 at 10:52












                  up vote
                  1
                  down vote













                  Use



                  echo ... | grep -Eo "sd[a-z]"


                  where -E interprets the pattern as an (extended) regular expression and -o prints only the matching parts in each line.






                  share|improve this answer
























                    up vote
                    1
                    down vote













                    Use



                    echo ... | grep -Eo "sd[a-z]"


                    where -E interprets the pattern as an (extended) regular expression and -o prints only the matching parts in each line.






                    share|improve this answer






















                      up vote
                      1
                      down vote










                      up vote
                      1
                      down vote









                      Use



                      echo ... | grep -Eo "sd[a-z]"


                      where -E interprets the pattern as an (extended) regular expression and -o prints only the matching parts in each line.






                      share|improve this answer












                      Use



                      echo ... | grep -Eo "sd[a-z]"


                      where -E interprets the pattern as an (extended) regular expression and -o prints only the matching parts in each line.







                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered Dec 22 '17 at 10:48









                      elm

                      1134




                      1134




















                          up vote
                          0
                          down vote













                          You did not specify what x should be in sdX so one could as well assume that it might be any character:



                          $ echo echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs /data"," | grep -o 'sd.'
                          sdb
                          sdc
                          sdd
                          sde
                          sdf


                          A literal . means any character in regular expressions.



                          And in perl because you wanted that explicitly:



                          $ echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | perl -nE 'say $& while /sd./g'
                          sdb
                          sdc
                          sdd
                          sde
                          sdf





                          share|improve this answer


























                            up vote
                            0
                            down vote













                            You did not specify what x should be in sdX so one could as well assume that it might be any character:



                            $ echo echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs /data"," | grep -o 'sd.'
                            sdb
                            sdc
                            sdd
                            sde
                            sdf


                            A literal . means any character in regular expressions.



                            And in perl because you wanted that explicitly:



                            $ echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | perl -nE 'say $& while /sd./g'
                            sdb
                            sdc
                            sdd
                            sde
                            sdf





                            share|improve this answer
























                              up vote
                              0
                              down vote










                              up vote
                              0
                              down vote









                              You did not specify what x should be in sdX so one could as well assume that it might be any character:



                              $ echo echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs /data"," | grep -o 'sd.'
                              sdb
                              sdc
                              sdd
                              sde
                              sdf


                              A literal . means any character in regular expressions.



                              And in perl because you wanted that explicitly:



                              $ echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | perl -nE 'say $& while /sd./g'
                              sdb
                              sdc
                              sdd
                              sde
                              sdf





                              share|improve this answer














                              You did not specify what x should be in sdX so one could as well assume that it might be any character:



                              $ echo echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs /data"," | grep -o 'sd.'
                              sdb
                              sdc
                              sdd
                              sde
                              sdf


                              A literal . means any character in regular expressions.



                              And in perl because you wanted that explicitly:



                              $ echo ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data"," | perl -nE 'say $& while /sd./g'
                              sdb
                              sdc
                              sdd
                              sde
                              sdf






                              share|improve this answer














                              share|improve this answer



                              share|improve this answer








                              edited Dec 22 '17 at 12:15

























                              answered Dec 22 '17 at 11:03









                              Arkadiusz Drabczyk

                              7,21521532




                              7,21521532




















                                  up vote
                                  0
                                  down vote













                                  Above result is achieved by awk one liner




                                   echo " ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","" | sed "s/,/n/g" | awk -F "/" 'print $3' | sed '/^$/d'



                                  output




                                  sdb
                                  sdc
                                  sdd
                                  sde
                                  sdf








                                  share|improve this answer
























                                    up vote
                                    0
                                    down vote













                                    Above result is achieved by awk one liner




                                     echo " ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","" | sed "s/,/n/g" | awk -F "/" 'print $3' | sed '/^$/d'



                                    output




                                    sdb
                                    sdc
                                    sdd
                                    sde
                                    sdf








                                    share|improve this answer






















                                      up vote
                                      0
                                      down vote










                                      up vote
                                      0
                                      down vote









                                      Above result is achieved by awk one liner




                                       echo " ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","" | sed "s/,/n/g" | awk -F "/" 'print $3' | sed '/^$/d'



                                      output




                                      sdb
                                      sdc
                                      sdd
                                      sde
                                      sdf








                                      share|improve this answer












                                      Above result is achieved by awk one liner




                                       echo " ""dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data","" | sed "s/,/n/g" | awk -F "/" 'print $3' | sed '/^$/d'



                                      output




                                      sdb
                                      sdc
                                      sdd
                                      sde
                                      sdf









                                      share|improve this answer












                                      share|improve this answer



                                      share|improve this answer










                                      answered Dec 23 '17 at 9:54









                                      Praveen Kumar BS

                                      1,010128




                                      1,010128




















                                          up vote
                                          -1
                                          down vote













                                          echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' 
                                          "dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",
                                          echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' | grep -Po 'sdw'
                                          sdb
                                          sdc
                                          sdd
                                          sde
                                          sdf





                                          share|improve this answer
























                                            up vote
                                            -1
                                            down vote













                                            echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' 
                                            "dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",
                                            echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' | grep -Po 'sdw'
                                            sdb
                                            sdc
                                            sdd
                                            sde
                                            sdf





                                            share|improve this answer






















                                              up vote
                                              -1
                                              down vote










                                              up vote
                                              -1
                                              down vote









                                              echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' 
                                              "dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",
                                              echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' | grep -Po 'sdw'
                                              sdb
                                              sdc
                                              sdd
                                              sde
                                              sdf





                                              share|improve this answer












                                              echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' 
                                              "dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",
                                              echo '"dfs.datanode.data.dir" : "/rid/sdb/oo/hdfs/data,/rid/sdc/oo/hdfs/data,/rid/sdd/oo/hdfs/data,/rid/sde/oo/hdfs/data,/rid/sdf/oo/hdfs/data",' | grep -Po 'sdw'
                                              sdb
                                              sdc
                                              sdd
                                              sde
                                              sdf






                                              share|improve this answer












                                              share|improve this answer



                                              share|improve this answer










                                              answered Dec 22 '17 at 10:37









                                              FaxMax

                                              423219




                                              423219






















                                                   

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