Shell Programming and Scripting

Hi all,

I am trying to write a script in shell which can connect me to a remote server and run some commands my problem is i cant pass the password barrier.I read a lot of articles where bloggers have suggested not to use telnet and to use something more secure like ssh.I tried ssh but as soon as the password is passed the scripts fails...

Code:

#!/usr/bin/sh
Server=172.XX.XXX.XX
port=23
login=test
passwd=test
cmd1="cd /export/home/user"

echo ssh ${login}@${Server}
sleep 2
echo ${passwd}
sleep 3
echo ${cmd1}
sleep 2
echo exit

-------------------------------------------
result
---------

Code:

ssh test@172.XX.XXX.XX
test
cd /export/home/user
exit

please help

You have to change your script to input into the ssh command. Doing an ssh and then doing an echo won't work for it closes the tty from the ssh command before it executes the echo command. You need to instead provide input into the command using the << syntax. Such as

Code:

ssh test@172.xxx.xxx.xxx << EOF
${password}
${cmd}
EOF

Code:

[root@sur-core-L001 scripts]# sh msc1.sh 
Pseudo-terminal will not be allocated because stdin is not a terminal.
Password:

doesnt work ...

Exchanging ssh keys is not an option?

something which i delibrately want to avoid. i would still prefer a way to pass the password to script and mate it work.

Why, exactly, do you want to avoid exchanging keys? It's a lot less maintenance compared to making sure that all scripts use the correct password, and it's much more secure, as there's no password stored in plain-text for everyone to read.

one reason is one of the servers from which i am trying to get the data is revenue critical for my organization and i am not very confident of doing the change in ssh key.