Merge two files using awk in linux

Question

I have a 1.txt file:

betomak@msn.com||o||0174686211||o||7880291304ca0404f4dac3dc205f1adf||o||Mario||o||Mario||o||Kawati
zizipi@libero.it||o||174732943.0174732943         


        

Answer 1

You can use this awk to get your output:

awk -F ':' 'NR==FNR{a[$1]=$2 FS $3; next} FNR==1{FS=OFS="||o||"; gsub(/[|]/, "\\\\&", FS)}
$3 in a{$3=a[$3]; print}' file2 file1 > result.txt

cat result.txt
frankmel@hotmail.de||o||0174844404||o||demodemo:||o||Melanie||o||Melanie||o||Kiesel
apoka-paris@hotmail.fr||o||0174847613||o||~~@!:/92\||o||Sihem||o||Sihem||o||Sousou
sofianomovic@msn.fr||o||174902297.0174902297||o||134:@a1||o||Nabile||o||Nabile||o||Nassime