Windows & DOS: Issues & Discussions

gawk -F: "FNR==NR{a[($1)]=$2;next}$1 in a{print $0 FS a[$1]}"
                      ^ matching field file1             ^ matching field file2
                           ^ the field we want to append from file1
                                   ^ matching field file2(agian)

#!/usr/bin/nawk -f
BEGIN {FS=":"}
{
if (FNR==NR)
{
a[$1]=$2;
next;
}
}

for ($2 in a) {
print $0 FS a[$2];
}

#!/usr/bin/nawk -f
BEGIN {FS=":"}
{
  if (FNR==NR)
  {
    a[$1]=$2;
    next;
  }
  for ($2 in a) {
    print $0 FS a[$2];
  }
}