[INS-06006] Passwordless SSH connectivity not set up between the following nodes

Environment
GI – 11.2.0.4.0
RHEL – 6.7

Untitled

Learning:
Hostname should be use either in small letter or capital letter do not mix it.

Solution:
11.2.0.4 runInstaller: [INS-06006] Passwordless SSH connectivity not set up between the following nodes(s) (Doc ID
1597212.1)