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open(FH, "config.txt");
 $cfg->guess_syntax(\*FH));
...
my @tags = $cfg->param("Tags");
  unlink $_ for @tags;

my @valid_tag = intersect(@user_tags, @hash_tags);
if (@valid_tag == 0){
...
                        chomp (@valid_tag);
}

$ script.p, -c "test"

$ script.pl -c "test page"