[SOLVED] Creating rsa keys for ssh - Having trouble- Still asks for password

completelinuxnube · 11-19-2012, 04:38 PM

Hello Friends,

I'm am trying to create rsa keys for ssh to use with rsync. I want to be able to have my nas connect to my three servers automatically without asking me for a password everytime and pull data for backups. I have tried all the tutorials and I am still lost. I still get a password prompt everytime. What am I doing wrong?

Thanks

linosaurusroot · 11-19-2012, 04:47 PM

Tell us in detail what you've done so far and show

Code:

ls -l ~/.ssh/

completelinuxnube · 11-19-2012, 05:28 PM

Okay. I generated the rsa key pair on nas2, which is the server that I want to connect to my other three servers to grab the data for backup.

I used this command:

Code:

ssh-keygen -t rsa -f /root/.ssh/4rsync/rsa_key4backup

Then I used this command to copy the .pub key to the target machine:

Code:

scp ~/.ssh/rsa_key4backup.pub dns1:/root/.ssh/rsa_key4backup.pub

and I entered the password for the target server.

Next I ssh into target (dns1) to register the key:

Code:

ssh dns1
entered the password
cat rsa_key4backup.pub >> authorized_keys

Here is the ls -l ~/.ssh/ output for target (dns1):

Code:

root@dns1:~# ls -l ~/.ssh/
total 64
-rw------- 1 root root 2637 2012-11-19 16:28 authorized_keys
-rw------- 1 root root  391 2012-11-19 16:04 authorized_keys2
-rw-r--r-- 1 root root  395 2011-11-07 14:52 commserv.jab
-rw------- 1 root root  668 2005-12-07 09:59 id_dsa
-rw-r--r-- 1 root root  610 2005-12-07 10:00 id_dsa.pub
-rw------- 1 root root  883 2005-12-07 09:59 id_rsa
-rw------- 1 root root 1675 2012-09-20 17:19 id_rsa-new
-rw-r--r-- 1 root root  391 2012-09-20 17:19 id_rsa-new.pub
-rw-r--r-- 1 root root  230 2005-12-07 10:00 id_rsa.pub
-rw-r--r-- 1 root root 2456 2008-07-30 12:23 jab
-rw-r--r-- 1 root root 6501 2012-09-21 16:41 known_hosts
-rw-r--r-- 1 root root  223 2005-08-27 20:49 rsa_key.pub
-rw-r--r-- 1 root root  391 2012-11-19 16:02 rsa_key4backup.pub                          <<<<<<<<This is my .pub key from nas2]]]]]]]
-rw-r--r-- 1 root root  395 2008-07-30 12:54 serv_ssh_host_rsa_key.pub
-rw-r----- 1 root root  210 2011-11-07 15:50 uniserv.jab

Here is the ls -l ~/.ssh/ for nas2:

Code:

root@nas2:~#ls -l ~/.ssh/
drwxr-xr-x    2 root     root         1024 Nov 19 15:33 4rsync/                      <<<<<the rsa key pairs are in this dir]]]
-rw-r--r--    1 root     root          601 Oct  8 09:09 authorized_keys
-rw-r--r--    1 root     root         1116 Jul 12 10:44 authorized_keys2
-rw-------    1 root     root          668 Oct  8 09:09 id_dsa
-rw-r--r--    1 root     root         1699 Nov 19 15:52 known_hosts

linosaurusroot · 11-19-2012, 05:37 PM

When you do "ssh" from nas1 it expects keys in certain filenames (including ".ssh/id_dsa") but not the ones in the subdirectory where you have put the keys. You'll need to use "-i" to tell it what private key file to use.

Habitual · 11-19-2012, 06:31 PM

Code:

ssh -i  /root/.ssh/4rsync/rsa_key4backup  user@host

completelinuxnube · 11-20-2012, 08:05 AM

@linosaurusroot and @Habitual, thank you both very much. I now have a clear understanding of how this works and I have successfully accomplished my task.

Thanks again!!!

Habitual · 11-20-2012, 08:18 AM

You are Very Welcome.
Glad it worked out!