UNIX for Dummies Questions & Answers

Hi All,
I need to frame a unix script to logon to a unix box. The credentials needs to be obtained from a property file on the same location.

I am trying to use 'expect' and 'spawn' command to meet this req.

When I am passing values, these commands are working fine. but when I am trying to pass variable, it is failing...

Command used :

Code:

expect -c 'spawn ssh $UNIX_USER@$UNIX_BOX ; expect password ; send "($UNIX_PWD)\n" ; interact'

Error Message:

Code:

can't read "UNIX_USER": no such variable
    while executing
"spawn ssh $UNIX_USER@$UNIX_BOX "

Appreciate your help.

-kt

Why not use normal SSH keys instead of kludging in insecure noninteractive passwords with a third-party brute-forcing utility?

If I use normal ssh..then the password is prompted from the command prompt...
Is there a way to pass username/pwd together in ssh command?

Not if you use ssh keys. Just having the right files in the right places lets it go through automatically. Google 'passwordless ssh', there's tutorials for it all over the internet. No, because sane authentication systems like ssh, sftp, scp, sudo, and su are designed to not let you. It's very insecure. That's why they designed a noninteractive system using keys instead.