Red Hat

Hi all,

I was trying to do password less ssh log-in between two machines with different host name( linux & redhat), and I used the following commands:

Code:

ssh-keygen –t rsa

scp /root/.ssh/id_rsa.pub redhat:/root/.ssh/authorized_keys

Code:

ssh-keygen –t rsa

scp /root/.ssh/id_rsa.pub linux:/root/.ssh/authorized_keys

I am able to log-in from linux to redhat but not able to log-in from redhat to linux without password.

please suggest where I am lacking.......

Hello,

Does it DNS is resolving?
Print output your "nslookup".

Perhaps the ssh server and/or ssh client configurations are different on the servers?

We could be here all day trying at guessing. Best way of troubleshooting is to obtain data looking at the logs.

First ssh using the -v option: this will output the verbose process of login
Other places to obtain data are in /var/log. This is OS dependent. /var/log/auth, /var/log/secure* /var/log/audit/audit.log*, /var/log/messages are possible candidates for login information.


Common causes for ssh errors with key are:
Wrong permissions for ~/.ssh directory. It should be 700
Wrong ownership or permissions for ~/.ssh/authorized_keys. Depending if you are using an old version of openssh this file could be called authorized_keys2
It should have permission to write only to owner and not executable to anyone.

Hi Team,

Thanks for the support. But,I guess there was some mistake from my side in executing the commands as I got the desired output when I again performed the task.
Output:
-------------------------------------

Code:

[root@linux ~]# ssh redhat
Enter passphrase for key '/root/.ssh/id_rsa':
Last login: Thu Nov  7 07:06:40 2013 from linux.testlab.org
[root@redhat ~]#

-------------------------------------
-------------------------------------

Code:

[root@redhat ~]# ssh linux
Enter passphrase for key '/root/.ssh/id_rsa':
Last login: Thu Nov  7 23:36:19 2013 from redhat.testlab.org
[root@linux ~]#

-------------------------------------

I don't see that your using an ssh agent. Example below.

Code:

bitlord@linux> eval `ssh-agent`
bitlord@linux> ssh-add
Enter passphrase for /home/bitlord/.ssh/id_rsa: 
Identity added: /home/vivek/.ssh/id_dsa (/home/bitlord/.ssh/id_rsa)

Why are you useing root to login to anther server? Many Servers don't allow this. Try using a normal user account to do this.