Use open to open a file for reading or writing. Use glob if you need to expand wildcards. Use the diamond operator to read from a file. $. contains the current line number, so skip the first line in each file. 
#!/usr/bin/perl
use warnings;
use strict;

open my $OUT, '>', 'output.txt' or die "output.txt: $!";

for my $file (glob '*.txt') {
    open my $FH, '<', $file or die "$file: $!";
    while (<$FH>) {
        print {$OUT} $_ unless 1 == $.;
    }
}
close $OUT or die $!;

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Combine files with same extension in new file by choroba
in thread Combine files with same extension in new file by AhmedABdo

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