my $server_name; my $results; while (my $line = <$file>) { if ($line =~ /\[(.*)\]/) { $server_name = $1; } elsif ($line =~ /(\/.*)/) { die "file doesn't begin with servername line!" unless defined($server_name); push @{ $results->{$server_name} }, $1; } } foreach my $k (keys $results) { print "$k: " . join(" ", @{ $results->{$k} } ) . "\n"; }