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Full Discussion: Alternate to SLEEP for EXPECT within BASH script?
Top Forums Shell Programming and Scripting Alternate to SLEEP for EXPECT within BASH script? Post 302596140 by Corona688 on Monday 6th of February 2012 04:37:10 PM
Old 02-06-2012
ssh is designed to prevent you from using stored plaintext passwords, because they're very insecure; "interactive password authentication" means "password typed by a human being in realtime authentication" and nothing else will do. That's why you've had to use a third-party brute-forcing utility to make it work at all.

If you use ssh the proper way, with keys, you won't need to sledgehammer in an insecure plaintext password with a third-party brute-forcing utility like expect, and will be able to automate things far, far easier since it can take input exactly as given with no mess, and won't cough up its own skull when the remote script reacts in an even slightly unexpected way:

Code:
#!/bin/sh
ssh -i /path/to/keys username@server <<EOF
        cd /folder1/logfiles
        tar -cvf logs.$serverName.$CURRENTDATE.tar *.log
        mv *.tar LOG_ARCHIVE
EOF

When using keys, it really is that simple, because you don't have to fight it.

google 'passwordless ssh' to find out how you're supposed to do it. There's hundreds of tutorials all over the internet.
Last edited by Corona688; 02-06-2012 at 05:43 PM..
This User Gave Thanks to Corona688 For This Post:
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LEARN ABOUT OPENDARWIN

ssh-keysign

ssh-keysign(1M)                                                                                                                    ssh-keysign(1M)

NAME

       ssh-keysign - ssh helper program for host-based authentication

SYNOPSIS

       ssh-keysign

       ssh-keysign  is  used  by ssh(1) to access the local host keys and generate the digital signature required during host-based authentication
       with SSH protocol version 2. This signature is of data that includes, among other items, the name of the client host and the  name  of  the
       client user.

       ssh-keysign  is  disabled  by  default and can be enabled only in the global client configuration file /etc/ssh/ssh_config by setting Host-
       basedAuthentication to yes.

       ssh-keysign is not intended to be invoked by the user, but from ssh. See ssh(1) and sshd(1M) for more information about host-based  authen-
       tication.

       /etc/ssh/ssh_config

           Controls whether ssh-keysign is enabled.

       /etc/ssh/ssh_host_dsa_key
       /etc/ssh/ssh_host_rsa_key

           These  files  contain the private parts of the host keys used to generate the digital signature. They should be owned by root, readable
           only by root, and not accessible to others. Because they are readable only by root, ssh-keysign must  be  set-uid  root  if  host-based
           authentication is used.

       ssh-keysign will not sign host-based authentication data under the following conditions:

         o  If the HostbasedAuthentication client configuration parameter is not set to yes in /etc/ssh/ssh_config. This setting cannot be overri-
            den in users' ~/.ssh/ssh_config files.

         o  If the client hostname and username in /etc/ssh/ssh_config do not match the canonical hostname of  the  client  where  ssh-keysign  is
            invoked and the name of the user invoking ssh-keysign.

       In  spite of ssh-keysign's restrictions on the contents of the host-based authentication data, there remains the ability of users to use it
       as an avenue for obtaining the client's private host keys. For this reason host-based authentication is turned off by default.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWsshu                     |
       +-----------------------------+-----------------------------+
       |Interface Stability          |Evolving                     |
       +-----------------------------+-----------------------------+

       ssh(1), sshd(1M), ssh_config(4), attributes(5)

AUTHORS

       Markus Friedl, markus@openbsd.org

HISTORY

       ssh-keysign first appeared in Ox 3.2.

                                                                    9 Jun 2004                                                     ssh-keysign(1M)
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