Shell Programming and Scripting

awk 'NR==FNR{a[$1]=$0;next$3 in a{print $0 a[$1] " " a[$3]}' inputfile_A_1.out  inputfile_B_1.out  >  outputfile1.txt

awk 'NR==FNR{a[$1]=$0;next} $3 in a{print $0 a[$1] " " a[$3]}' inputfile_A_1.out  inputfile_B_1.out  >  outputfile1.txt

#!/bin/ksh

for i in 1 2 3 4 5
do
  awk 'NR==FNR{a[$1]=$0;next} $3 in a{print $0,a[$1], a[$3]}' "inputfile_A_${i}.out"  "inputfile_B_${i}.out" > "outputfile${i}.txt"
done

i=1
for j in $(ls *_L000058.txt)
do 

b_file=$(echo $j | awk -F"_" 'BEGIN{OFS=FS}{print $1,$2,$3"_L000102.txt"}')

awk 'NR==FNR{a[$1]=$0;next} $3 in a{print $0,a[$1], a[$3]}' $j $b_file  > "outputfile${i}.txt"

i=$(expr $i + 1)

done

for i in *_L000058.txt
do
 awk 'NR==FNR{a[$1]=$0;next} $3 in a{print $0,a[$1], a[$3]}' $i ${i%_*}_L000102.txt > outputfile$((++j)).txt
done