SSH in shell script with password

Question

I want to write one shell script like

command1    
ssh vivek@remotehost 
    fire command on remote host

Now I have password in pass.txt . But when I change stdin with file. It is not reading password from file.

script.sh < password.txt

It is prompting for the password in place of reading password from the file. What I am doing wrong ?

Second problem is that shell script don't shows the command fired. Is there a way , I can show fired command from it ?

Note : I don't have key based access on remote system. I can only use password based login for ssh.

Do you have remote ssh server deliberately set up to deny key-based authorization, or you can't write to $HOME/.ssh directory? That's the only 2 ways I can think of why you can't use keys... — GreyCat
– GreyCat, Commented Jun 1, 2011 at 7:05
possible duplicate of Way to automatically enter in shell password? — Aaron Digulla
– Aaron Digulla, Commented Oct 3, 2013 at 14:55

Joshua Smith · Accepted Answer · 2011-05-31 18:32:33Z

2

You can use ssh-agent or expect (the programing language) to do this.

answered May 31, 2011 at 18:32

Joshua Smith

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salva · Accepted Answer · 2011-05-31 19:18:35Z

1

OpenSSH ssh does not reads the password from stdin but from /dev/tty. That's why you have to use Expect or some other similar tool to automate it.

plink is another client, also available for Linux/Unix that accepts the password as a parameter on the command line... though that has some ugly security implications.

answered May 31, 2011 at 19:18

salva

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GreyCat · Accepted Answer · 2011-06-01 13:29:01Z

1

Okay, just to mention yet another option: sshpass is a tool developed for exactly the task of "fooling" regular openssh client to accept password non-interactively.

answered Jun 1, 2011 at 13:29

GreyCat

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