You need chomp to remove the newline from your password.

my $random_file = "/home/sites/site70/web/cgi-bin/i-merchant/admin/set
+up/ric.txt"; 

open (FILE, $random_file) or die $!;
my @LINES=<FILE>; 
close(FILE);

my $OTP = splice @LINES, rand @LINES, 1;
chomp $OTP;

open (FILENEW, ">$random_file") or die $!;
print FILENEW, @LINES;
close (FILENEW);

my $PPP = $OTP;
[download]

Also, if more than one process can access the file at the same time then you need to look at file locking.

--
<http://www.dave.org.uk>

"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg