non-interactive ssh connections (was Re: RSYNC ISSUE)

[Kar, Gouri X. -ND]

Hi, I have tried to generate the key with ssh-keygen -P ( remove the
passphrase) and copied it to the target system. However, it doesn't work.
Any insite with the way I am distributing the KEYS

-----Original Message-----
From: Martin Pool [mailto:mbp at samba.org] 
Sent: Tuesday, July 23, 2002 6:53 PM
To: Kar, Gouri X. -ND
Cc: rsync at lists.samba.org; Johnson, Gary X. -ND; Minyard, Mark X. -ND
Subject: non-interactive ssh connections (was Re: RSYNC ISSUE)


(Gouri: a more descriptive subject line will help you get repsonses in
future, and please send your mail to rsync at lists.samba.org.  Read
<http://www.tuxedo.org/~esr/faqs/smart-questions.html>)

On 23 Jul 2002, "Kar, Gouri X. -ND" <Gouri.X.Kar.-ND at disney.com> wrote:
> Hi guys, I am trying to schdule a script which makes call to RSYNC
> over SSH. The same script works fine on the command prompt and 
> sucessfully transfer the file from source to destination system with 
> SSH.
> 
> However, executing the script from CRONJOB doesn't work. It comes up
> with following error message
> 
> From: daemon
> To: db2log
>  
> You have no controlling tty and no DISPLAY.  Cannot read passphrase.
> You have no controlling tty and no DISPLAY.  Cannot read passphrase.
> warning: Authentication failed.
> Disconnected; authentication cancelled by user (Authentication 
> cancelled by user.). unexpected EOF in read_timeout

The problem is that ssh, as it says, cannot read the passphrase to unlock
your ssh key.  

If you want to do ssh from a cron job, you must have a key with no
passphrase.  You can remove a passphrase from an existing key using
"ssh-keygen -p" (see the manual).  You should probably make sure that the
key is authorized only for the accounts necessary to make the backup.

-- 
Martin