problem to send a command to another host

[Claudio_4]

Hi all !

I have a problem to execute a remote command from a HP-UX11 box.

BOX1 and BOX2 are both HP-UX11 machines.
From BOX1 i do this command:

( sleep 2
echo root
sleep 2
echo password
sleep 5
echo ls -l
sleep 5
echo exit ) | telnet BOX2

and it work !


I do the same from BOX2 and the result is:

( sleep 2
echo root
sleep 2
echo password
sleep 5
echo ls -l
sleep 5
echo exit ) | telnet BOX1

Trying...
Connected to saturno.
Escape character is '^]'.
Local flow control on
Telnet TERMINAL-SPEED option ON

HP-UX saturno B.11.00 E 9000/879 (tb)

login: root
Password: Connection closed by foreign host.

BOX1, can't do this command to itself !
otherwise, if I type:

telnet BOX1
login: root
password: passwod

it works.

Someone can help me ?
thanks

[Stefan Schulz]

Hi,

your script looks ok. Are you sure there is not typo in the script?

Perhaps there is an extra blank character behind root or the password.

in vi do a :set list to see the end of line. Make sure there are no extra blank characters.

Hope this helps

Regards Stefan

[Stefan Farrelly]

Scripts look good. If the login or password were wrong you would get a login incorrect message. Connection closed implies the remote server is closing the connection. Possibilities are the account .profile in their homedir, or /etc/profile. Try renaming the .profile in the home dir to something else temporarily and retry, and if it doesnt work check /etc/profile (or the home dirs .kshrc or .shrc files).

[Frank Slootweg]

As you have found, non-interactive use of telnet(1) is very tricky, especially because there is no handshaking, i.e. you easily get timing issues.

Question: Why are you using telnet(1) instead of remsh(1)?

If you must use telnet(1), you may want to have a look at the 'expect' program. As far as I know, 'expect is available from The HP-UX Porting and Archive Centre http://hpux.connect.org.uk

If you are worried about the limited security that remsh(1) provides, then you may want to have a look at ssh. Hopefully others can give pointers to ssh.

[Claudio_4]

Hi all !

Thanks for yours reply.

I'm sure I have no typo in my cmd.

I try to play with /etc/profile and the .profile in user home directory. The /etc/profile are identical in BOX1 and BOX2.
I try to mv the /home/user/.profile from BOX2 to BOX1 but I have the same problem.

I think I'll use remsh to send my remote command.

Thank's to all !