Configure SSH Keys for RAC on Linux

==Configure SSH on each node in the cluster. Log in as the "oracle" user and perform the following tasks on each node. ==

su - oracle

mkdir ~/.ssh

chmod 700 ~/.ssh

/usr/bin/ssh-keygen -t rsa # Accept the default settings.

The RSA public key is written to the "~/.ssh/id_rsa.pub" file and the private key to the "~/.ssh/id_rsa" file.

== generate authorized_keys ==

Log in as the "oracle" user on RAC1, generate an "authorized_keys" file on RAC1 and copy it to RAC2 using the following commands.

su - oracle

cd ~/.ssh

cat id_rsa.pub >> authorized_keys

scp authorized_keys rac2:/home/oracle/.ssh/

Next, log in as the "oracle" user on RAC2 and perform the following commands.

su - oracle

cd ~/.ssh

cat id_rsa.pub >> authorized_keys

scp authorized_keys rac1:/home/oracle/.ssh/

The "authorized_keys" file on both servers now contains the public keys generated on all RAC nodes.

To enable SSH user equivalency on the cluster member nodes issue the following commands on each node.

ssh rac1 date

ssh rac2 date

ssh rac1.localdomain date

ssh rac2.localdomain date

exec /usr/bin/ssh-agent $SHELL

/usr/bin/ssh-add