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questions regarding ssh

Posted on 2011-03-24
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Last Modified: 2012-08-13
two questions regarding ssh.

I am  logged in to a jumpoff box.  Can i  "carry" my autentication to the next box  without putting in my password again ?

Every time I ssh it ask me "do you want keep your key this time or ."  I just want to default to sshing to the box without a this question.  We have a lot of systems and liikey will not be going from the jumpbox to the target that often.


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Question by:TIMFOX123
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6 Comments
 
LVL 31

Expert Comment

by:farzanj
ID: 35212120
Yes, you can do ssh without entering your password every time.

You can setup a public and private key mechanism and this way you will not have to enter your password every time.  Setting it up is fairly simple too
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farzanj earned 250 total points
ID: 35212135
When you enable your public/private keys on the host and the target, your source host is also entered into known hosts in the target machine.  You just have to say, "yes" for the first time when it asks you whether you want it save it.  Thereafter, you don't need to do anything.  You just say, "ssh hostname" and it would log you in with the current userID, provided the same userID exists on the target machine as well.
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Assisted Solution

by:farzanj
farzanj earned 250 total points
ID: 35212148
Setup includes the following steps:

1.  Generation of asymmetrical keys --public/private pair.
2.  Keeping the private key on the jump host and copying the public on the target machine.
3.  The public key is copied to the following file : ~userID/.ssh/authorized_keys
4.  Making sure the keys or the key folder has the right permissions.
5.  Doing the first ssh and typing "yes"
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LVL 12

Assisted Solution

by:upanwar
upanwar earned 125 total points
ID: 35212908
For the password less authentication FARZANI has suggested the correct way but If you want that while sshing any target system, the system should not ask "do you want keep your key this time or ."  . Then you can suppress that message with option -q

-q           Quiet mode.  Causes all warning and diagnostic messages to be suppressed.
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Assisted Solution

by:mohansahu
mohansahu earned 125 total points
ID: 35213615
Hi,

ssh without prompting for password ,follow the below steps.

1.generate ssh key on source host
# ssh-keygen -t rsa
2.copy public ssh key to each destination host
#scp ~/.ssh/id-rsa.pub desthost:~
3.create an authorized key file on each destination host
#ssh desthost(entr pwd)
# cat id-rsa.pub >> .ssh/authorized-keys,if .ssh directory doesnt exist create it.
4.restart the sshd services

MS

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Author Closing Comment

by:TIMFOX123
ID: 35214291
thank you all
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