Please read How do I post a question effectively?.

Below is your code reformatted for others to be able to help you:

#!/usr/bin/perl -w 
use strict;
find_serv ();
sub find_serv {
    @ARGV == 2 || die "usage: $0 INDEX_FILE '.com'\n";
    my ( $INDEX_FILE, $com ) = @ARGV;
    my $list = "grep 'href=' $INDEX_FILE|" ;
    open (my $HAN, "$list" ) || die "Cannot open '$INDEX_FILE' because
+:: $!";
    while (<$HAN>) {
        chomp $_;
        my @array = split (/\//, $_);
        if ($array2 =~ /$com/ ){
            my $sorted = $array2;
            system (sort -u $scalar);
            # - doesn't work 
            #print "$_\n" 
            for sort { versioncmp($a,$b) } $sorted; 
        }
    }
} #END sorted file should look like www.google.ie www.icq.com www.....
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