There may some Updated from my question, thanks monks

May be I need describ more detail on menu mode..

in .profile >>

stty -isig
stty ignbrk
set -o ignoreeof
trap "" INT
trap "" stop
trap "" quit
. $HOME/menu.sh
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in $HOME/menu.sh

  echo '\t +---------------------------------------------------------+
+'
  echo '\t |            Operation Menu                   |'
  echo '\t | ======================================================= |
+'
  echo '\t |                                                         |
+'
..... ...
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I try to use output log and Dump log see more information: DUMPLOG:

 ....login successfully .... < 0x00460: 2d 2d 2d 2d  2d 2d 2d 2d  2d 2
+d 2d 0d  0a 4c 61 73  -----------..Las
< 0x00470: 74 20 75 6e  73 75 63 63  65 73 73 66  75 6c 20 6c  t unsuc
+cessful l
< 0x00480: 6f 67 69 6e  3a 20 54 68  75 20 41 70  72 20 31 37  ogin: T
+hu Apr 17
< 0x00490: 20 31 30 3a  35 33 3a 31  33 20 54 41  49 53 54 20   10:53:
+13 TAIST 
< 0x004a0: 32 30 30 38  20 6f 6e 20  2f 64 65 76  2f 70 74 73  2008 on
+ /dev/pts
< 0x004b0: 2f 30 20 66  72 6f 6d 20  31 30 2e 31  35 39 2e 36  /0 from
+ 10.159.6
< 0x004c0: 36 2e 35 30  0d 0a 4c 61  73 74 20 6c  6f 67 69 6e  6.50..L
+ast login
< 0x004d0: 3a 20 54 75  65 20 41 70  72 20 32 32  20 31 39 3a  : Tue A
+pr 22 19:
< 0x004e0: 31 32 3a 30  36 20 54 41  49 53 54 20  32 30 30 38  12:06 T
+AIST 2008
< 0x004f0: 20 6f 6e 20  2f 64 65 76  2f 70 74 73  2f 33 20 66   on /de
+v/pts/3 f
< 0x00500: 72 6f 6d 20  31 30 2e 31  35 39 2e 36  37 2e 32 34  rom 10.
+159.67.24
< 0x00510: 0d 0a 0d 0a                                         ....

> 0x00000: 64 66 0d 0a                                         df..
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Output_log :

user1
pAssword123
df
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print out after script finish

----------------------------------------------------------------------
+----------
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The script I almost copy from cpan

use Net::Telnet ();
$username = "user1";
$passwd = "pAssword123";
$prompta = '/\w.*/';
$t = new Net::Telnet (Prompt => $prompta,
            Timeout => 20, 
            Dump_Log => "log.txt", 
            Output_log=>"outlog.txt"
            );
$t->open("10.188.37.10");
$t->login($username, $passwd);
@lines = $t->cmd("df");
print @lines;
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