Shell Programming and Scripting

abc   xxx    hhh    555 678   line label 99 in prod support
cde   rrr     kkk     321 543   line label 55 in dev

abc   xxx    hhh    555 444
cde   rrr     kkk     321 789

abc   xxx    hhh    555 444   line label 99 in prod support
cde   rrr     kkk     321 789   line label 55 in dev

   while read VNX2 DM2 FS2 SZ2 GL_NUM2 GL_NAME2
    do

        if egrep "$VNX2 $DM2 $FS2" f2.out
           then
              SZ=`cat f2.out | egrep  "$VNX2 $DM2 $FS2" | awk '{print $4}'`
              echo "$VNX2 $DM2 $FS2 $SZ $GL_NUM2 $GL_NAME2"
           else
             echo "Error...."
        fi


    done < f1.out

awk '
        NR == FNR {
                k = $1 FS $2 FS $3 FS $4
                $1 = $2 = $3 = $4 = $5 = ""
                sub ( /^ */, x )
                A[k] = $0
                next
        }
        {
                k = $1 FS $2 FS $3 FS $4
                if ( k in A )
                        print k, $5, A[k]
        }
' file1 file2

awk 'function key(){
                      return $1 FS $2 FS $3 FS $4
                   }
            FNR==NR{
                     A[key()]=$0
                     next
                   }
   ((v=key()) in A){
                     while(++i<=5)$i=x;
                     $0=$0; $1=$1
                     print A[v],$0;i=0
                   }
    ' file2 file1

abc   xxx    hhh    555 444 line label 99 in prod support
cde   rrr     kkk     321 789 line label 55 in dev

awk '{i=$1 FS $2 FS $3} NR==FNR{A[i]=$5; next} i in A{$5=A[i]}1' file1 file2