[GPFS] Authenticate ssh, rsh before GPFS configuration
Authenticate ssh, rsh connection using DSA or RSA before GPFS configuration</titile>
<meta description="How to jauthenticate ssh, rsh connection using DSA or RSA bfore GPFS configuration">
If you want to make a connection between GPFS nodes, you need to config and authenticte rsh or ssh connection each other. I recommend you ssh connection and DSA authentication for security. (It's the same way to get a RSA authentication.)<br />
<br />
1. test each server whether ssh authentication is well connected or not<br />
<b>node1# ssh root@node2_name ls</b><br />
<b>node2# ssh root@node1_name ls</b><br />
<br />
If password required when you insert upper command, you need to get a ssh authentication(go to second procedure)<br />
<br />
2. Generate DSA key on both nodes as a below picture.<br />
Then you will see the path of id_dsa and id_dsa.pub files.<br />
(when enter, just press enter)<br />
<br />
<b># ssh-keygen -t dsa or # ssh-keygen -t rsa</b><br />
<br />
<img alt="ssh1" height="352" src="https://farm3.staticflickr.com/2935/14219962565_ef6b9b2dc3_o.png" width="640" />
<br />
<br />
3. Change the directory to '.ssh', you can see the '.pub' file generated. Move this file to the other node using scp.<br />
(if you use rsa, you just change the word from dsa to ras.)<br />
<br />
<b># scp /.ssh/id_dsa_pub 상대편노드:/.ssh/id_dsa_pub.본인노드</b><br />
<br />
In this picture<br />
<b>node1 # scp id_dsa.put node2:/.ssh/id_dsa_pub.node1</b><br />
<b>node2 # scp id_dsa.put node1:/.ssh/id_dsa_pub.node2</b><br />
<br />
<br />
<img alt="ssh2" height="343" src="https://farm6.staticflickr.com/5590/14196804356_3ae219dde1_o.png" width="640" />
<br />
<br />
4. Insert tossed pub key to authorizd_keys it's own, authentication will be completed.<br />
<br />
<b># cat id_dsa_pub_file-name >> authorized_keys</b><br />
<br />
Excute below command at each other<br />
<b>node1# cat id_dsa_pub.node2 >> authorized_keys</b><br />
<b>node2# cat id_dsa_pub.node1 >> authorized_keys</b><br />
<br />
<br />
<img alt="ssh3" height="340" src="https://farm3.staticflickr.com/2895/14219962465_c980530a35_o.png" width="640" />
<br />
<br />
5. If you complete until number 4, excute number 1 again for confirmation.<br />
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