[INS-40980] Installer has detected that alias names is specified for the following nodes: [dc01x02].

Cause:

This error occurs when password less ssh equivalency between nodes in RAC are not configured properly

Workaround:

Reconfigure passwordless ssh between each nodes and try again

Node 1:

[oracle@dc01x01 .ssh]$ ssh-keygen -t rsa

Generating public/private rsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_rsa.
Your public key has been saved in /home/oracle/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:z73dsIGJcYveK5oWf8MhL17BY33Zeo6y/inz7CwC2BQ oracle@dc01x01.localdomain
The key's randomart image is:
+---[RSA 2048]----+
|                 |
|        E        |
|         .       |
|        .  . .  o|
|       +S . * ..o|
|      . +o.B.* o |
|         +=+*.+ .|
|        .o=oX= X |
|       .ooo**%@ o|
+----[SHA256]-----+
[oracle@dc01x01 .ssh]$ cat id_rsa.pub | ssh dc01x02 'cat >> ~oracle/.ssh/authorized_keys'

The authenticity of host 'dc01x02 (192.168.8.55)' can't be established.
ECDSA key fingerprint is SHA256:pM2hM8K4tOdqZp950VHzK5OOHJ1UmsUEwGpDR53iQd8.
ECDSA key fingerprint is MD5:d0:96:e2:0c:55:9c:2a:35:9b:b1:01:ae:dc:0d:97:6e.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'dc01x02,192.168.8.55' (ECDSA) to the list of known hosts.
oracle@dc01x02's password:

[oracle@dc01x01 .ssh]$ ssh dc01x02
Last login: Wed Sep 15 03:00:38 2021 from dc01x01.localdomain

[oracle@dc01x02 ~]$ ssh dc01x01
Last login: Wed Sep 15 03:01:53 2021 from dc01x02.localdomain

Node 2:

[oracle@dc01x02 .ssh]$ ssh-keygen -t rsa

Generating public/private rsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_rsa.
Your public key has been saved in /home/oracle/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:UX7EzIdCOWWG11BRHCMHioFOMbcEoHun/I7ZCebS61M oracle@dc01x02.localdomain
The key's randomart image is:
+---[RSA 2048]----+
|     ..++=oB*B+Bo|
|    .  o+oO+B = o|
|   .  o .o.=..   |
|    .  . . .     |
|   . . .S        |
|    o oE         |
|    .=.          |
|   .oo* .        |
|    o*+=         |
+----[SHA256]-----+
[oracle@dc01x02 .ssh]$ cat id_rsa.pub | ssh dc01x01 'cat >> ~oracle/.ssh/authorized_keys'
oracle@dc01x01's password:

[oracle@dc01x02 .ssh]$
[oracle@dc01x02 .ssh]$ ssh dc01x01
Last login: Wed Sep 15 03:00:57 2021 from dc01x02.localdomain

[oracle@dc01x01 ~]$ ssh dc01x02
Last login: Wed Sep 15 03:01:48 2021 from dc01x01.localdomain

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