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Are you sure you want to continue connecting (yes/no)?

Posted on 2011-09-12
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Last Modified: 2012-05-12
Hi,

On Red Hat Enterprise Linux Server release 5.4 (Tikanga),
I am trying to create a script that will automatically install software on a remote server.
I have it's root password and there are no security issues.
When I run the ssh/scp commands I get the question in the title.
I am looking for a way to automatically acknowledge this question

My code looks somthing like this:

ssh-keygen -R ${DG_NODE}
rm -rf  ~root/.ssh/id_rsa*                                            
alias scp='scp -o StrictHostKeyChecking=no -o BatchMode=yes '
ssh-keygen -q -t rsa -f aaa -N "" -f ~root/.ssh/id_rsa
scp ~root/.ssh/id_rsa.pub root@${DG_NODE}:~root/.ssh/authorized_keys

Using the -o UserKnownHostsFile=/dev/null  option did not help as well.
Thanks
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Question by:peledc
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5 Comments
 
LVL 7

Expert Comment

by:jackiechen858
ID: 36525547
Edit /etc/ssh/ssh_config:


StrictHostKeyChecking no
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LVL 28

Expert Comment

by:Jan Springer
ID: 36525564
If you have copied the public key over and performed a manual ssh or scp using that from/to account, then you shouldn't be asked again unless the keys change.
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LVL 21

Accepted Solution

by:
Papertrip earned 500 total points
ID: 36525958
Without a known_hosts key, no special options:
[user@phxbastion1 ~]$ ssh den1mmail3.den.domain.com
The authenticity of host 'den1mmail3.den.domain.com (10.191.15.226)' can't be established.
RSA key fingerprint is 9e:e6:c7:a6:ab:33:00:29:2a:bd:fa:67:6d:27:39:a6.
Are you sure you want to continue connecting (yes/no)?

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Without a known_hosts key, but with special options:
[user@phxbastion1 ~]$ ssh den1mmail3.den.domain.com -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null
Warning: Permanently added 'den1mmail3.den.domain.com,10.191.15.226' (RSA) to the list of known hosts.
user@den1mmail3.den.domain.com's password:

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LVL 28

Expert Comment

by:Jan Springer
ID: 36525996
known_hosts gets automatically updated with each new connection.  The author should not have to manually modify that file.
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LVL 21

Expert Comment

by:Papertrip
ID: 36526063
known_hosts gets automatically updated with each new connection.  The author should not have to manually modify that file.

I don't think anyone is suggesting that.
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