So anonymous smartalec, post some code that proves your point.

The documentation proves my point. You want to refute the documentation, you post the code.

Here it is, adopted from perlipc, which has small typo ( die ... unless if... )

The server

#!/usr/bin/perl -Tw
use strict;
BEGIN { $ENV{PATH} = "/usr/bin:/bin" }
use Socket;
use Carp;
my $EOL = "\015\012";

sub logmsg { print "$0 $$: @_ at ", scalar localtime(), "\n" }

my $port  = shift || 2345;
die "invalid port" unless $port =~ /^ \d+ $/x;

my $proto = getprotobyname("tcp");

socket(Server, PF_INET, SOCK_STREAM, $proto)    || die "socket: $!";
setsockopt(Server, SOL_SOCKET, SO_REUSEADDR, pack("l", 1))    
                                                || die "setsockopt: $!
+";
bind(Server, sockaddr_in($port, INADDR_ANY))    || die "bind: $!";
listen(Server, SOMAXCONN)                       || die "listen: $!";

logmsg "server started on port $port";

my $paddr;

$SIG{CHLD} = \&REAPER;

for ( ; $paddr = accept(Client, Server); close Client) {
    my($port, $iaddr) = sockaddr_in($paddr);
    my $name = gethostbyaddr($iaddr, AF_INET);

    logmsg "connection from $name [",
            inet_ntoa($iaddr), "]
            at port $port";
            
    print Client prelen( "Hello there, $name, it's now ", scalar local
+time(), $EOL );
    print Client prelen( 'backslash \n__'."\n" );
    print Client prelen( 'backslash \r\n'."\r\n" );
    print Client prelen( 'backslash EOL_'.$EOL );
}
sub prelen {
    my $str = join '',@_;
    my $len = length $str;
    return "($len+6)$str";
}
[download]

And the client

#!/usr/bin/perl -w
use strict;
use Socket;
my ($remote, $port, $iaddr, $paddr, $proto, $line);

$remote  = shift || "localhost";
$port    = shift || 2345;  # random port
if ($port =~ /\D/) { $port = getservbyname($port, "tcp") }
die "No port" unless $port;
$iaddr   = inet_aton($remote)       || die "no host: $remote";
$paddr   = sockaddr_in($port, $iaddr);

$proto   = getprotobyname("tcp");
socket(SOCK, PF_INET, SOCK_STREAM, $proto)  || die "socket: $!";
connect(SOCK, $paddr)               || die "connect: $!";
binmode SOCK or die "binmode $!"; ## no effect on client side
while ($line = <SOCK>) {
    my $length = length $line;
    print "($length)$line";
}
close (SOCK)                        || die "close: $!";
exit(0);

__END__
$ perl client.pl
(65)(59+6)Hello there, localhost, it's now Wed Sep 14 03:53:10 2011
(21)(15+6)backslash \n__
(22)(16+6)backslash \r\n
(22)(16+6)backslash EOL_
[download]

The output from client

(65)(59+6)Hello there, localhost, it's now Wed Sep 14 03:53:10 2011
(21)(15+6)backslash \n__
(22)(16+6)backslash \r\n
(22)(16+6)backslash EOL_

The odd man out is the lone \n, it doesn't become \r\n

The strings are all the same size except for the line endings, with \n remaining \012 and \r remaining \015

So the documentation is correct

The client in my question is not a robot/program,

but a human using telnet.

Ok? Just do what perlport#Newlines says

    use Socket qw(:DEFAULT :crlf);
    local($/) = LF;      # not needed if $/ is already \012

    while (<SOCKET>) {
        s/$CR?$LF/\n/;   # not sure if socket uses LF or CRLF, OK
    #   s/\015?\012/\n/; # same thing
    }
[download]

Does that work for you?

This code is generating text manually,

what I ask is how to translate the text format generated by running shell commands `$cmd` when transfer to windows telnet client.

How is Re^8: Have trouble implementing a shell-alike script not working for you?

and kindly click the correct reply link

I think that it is beyond discussion that Perl prints LF for \n on a Unix system and Perl prints CRLF for \n on a Windows system.

No. That depends entirely upon layers/discipline and not on platforms.

Yes, some platforms have defaults, but they're not absolute.