About Passwordless SSH Configuration
Passwordless SSH configuration is a mandatory installation requirement for Oracle Grid Infrastructure installation to configure cluster member nodes.
Automatic Passwordless SSH configuration using OUI creates RSA encryption
keys on all nodes of the cluster. If you have system restrictions that require you to
set up SSH manually, such as using DSA keys, then use this procedure as a guide to set
up passwordless SSH. If SSH is not available, then Oracle Universal Installer (OUI)
attempts to use rcp
instead. However, these services are disabled by
default on most Linux systems.
To configure SSH, you must first create RSA or DSA keys on each cluster node,
and then copy all the keys generated on all cluster node members into an authorized keys
file that is identical on each node. Note that the SSH files must be readable only by
root
and by the software installation user
(oracle
, grid
), as SSH ignores a private key file if
it is accessible by others. In the examples that follow, the DSA key is used.
Note:
The supported version of SSH for Linux distributions is OpenSSH.Parent topic: Configuring SSH Manually on All Cluster Nodes