Shell Programming and Scripting

grep -f file1 file2 file3 | awk -F"[:-]" '{ print $2"\n"$3; }' >tmp
grep -vf tmp file2  >file2_modified
grep -vf tmp file3  >file3_modified

#!/bin/bash

searchdelete() {
   group=$(grep $1 $2) && sed -i '/-'"${group#*-}"'$/d' $2 $3
}
while read search; do
   searchdelete $search file{2,3} || searchdelete $search file{3,2}
done < file1

$> grep -Hvf <(grep -hf file1 file2 file3|tr '-' ' '|xargs -n1) file2 file3
file2:B-2
file2:C-2
file3:G-4

A2
D

A2-1
B-21
C-21
E-1
F-3

K-1
D-3
G-4
H-3

awk -F- '
FNR==1 { 
   if (FileNumber > 0) File[FileNumber, "Count"] = count;
   FileName[++FileNumber] = FILENAME 
   count = 0;
}
FileNumber <= 2 {
   count++;
   File[FileNumber, count, "Datas" ] = $0;
   File[FileNumber, count, "Group" ] = $2;
   Group[$1] = $2;
   next
}
{
   if ($1 in Group) Ignore[Group[$1]]++
}
END {   
   for (f=1; f<=2 ;f++) {
      file = FileName[f] ".new";
      printf "" > file;
      for (i=1; i<=File[f, "Count"]; i++) {
         if (! (File[f, i, "Group"] in Ignore) ) {
            print File[f, i, "Datas"] > file;
         }
      }
   }
}

' file2 file3 file1

$ cat file2.new
B-21
C-21
$ cat file3.new
G-4
$

$ grep -v -f file1 file2
C-2
B-2
G-5
F-1
H-4