Problem with logging into remote host

Shell Programming and Scripting
1

Hi All,

   I am using a script for remotely logging into a rhost using telnet and shutdown a server. The script is as follows.

IP = 10.24.12.23; export IP
UNAME = username ; export UNAME
PWD = password; export PWD
CRDIR = /etc/rc.d/init.d ; export CRDIR

echo "logging into remote host"

(
telnet $IP << EOF
$UNAME # username for logging into rhost
$PWD # password for logging

cd $CRDIR
sh shutdown.sh stop # for shutdowning the server
$PWD # password for shutdowning the server

logout
EOF ) >> log.$$

When I execute this script, I am getting an error saying that "unknown host". Can you please let me know what the problem is? If you know any other way of logging into a remote host. Can you please let me know ASAP.

THanks in Advance,
Patil.

2

It seems to be a problem with blanks, try:

IP=10.24.12.23; export IP
UNAME=username ; export UNAME
PWD=password; export PWD
CRDIR=/etc/rc.d/init.d ; export CRDIR
3

Hi,

Thanks for the reply, but in the script whatever I have written has not blank spaces. It is returning an error

"Closed by a foreign host"

Please let me know if anyone has faced this error and what was the solution.

Thanks in advance,
Patil.

4

You cant use redirected input with telnet ... you need to use a tool like expect: http://expect.nist.gov/

5

Try something like this:


IP=10.24.12.23
UNAME=username
PWD=password
(
    sleep 2 
    echo "$UNAME"; sleep 2
    echo "$PWD"; sleep 2
    echo "pwd; whoami; hostname; exit"   # Commands here.
    sleep 2
) | telnet "$IP"

Regards.