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SSH Logins On An Exadata System Fail After It Was Upgraded From Oracle Linux 6 to Oracle Linux 7 (Doc ID 2576357.1)

Last updated on AUGUST 16, 2019

Applies to:

Linux OS - Version Oracle Linux 7.0 and later
Linux x86-64

Symptoms

An Exadata system was upgraded from Oracle Linux 6.9 to Oracle Linux 7.6 as part of an Exadata PSU to upgrade the Exadata image from 18.1.7.0.0.18021 to 19.2.2.0.0.190529 being applied to the customer's environment.

However after the upgrade, the customer was no longer able to ssh with non root user accounts (such as the oracle user account) to the upgraded system, with the following errors logged to /var/log/secure whenever a non-root user attempted to ssh to the affected system:

$ tail var/log/secure
Jul 27 00:02:10 <hostname> sshd[218709]: Connection from <IPADDR> port 59631 on <IPADDR> port 22
Jul 27 00:02:11 <hostname> sshd[218709]: reprocess config line 46: Deprecated option RSAAuthentication
Jul 27 00:02:11 <hostname> sshd[218709]: reprocess config line 53: Deprecated option RhostsRSAAuthentication
Jul 27 00:02:11 <hostname> sshd[218709]: reprocess config line 57: Deprecated option RhostsRSAAuthentication


The following errors are also seen in /var/log/messages when a non-root user attempts to connect via ssh:

Jul 26 23:50:24 <hostname> sshd[350623]: rexec line 53: Deprecated option RhostsRSAAuthentication
Jul 26 23:50:24 <hostname> sshd[350623]: rexec line 57: Deprecated option RhostsRSAAuthentication
Jul 26 23:50:24 <hostname> sshd[350623]: rexec line 114: Deprecated option UseLogin
Jul 27 00:02:10 <hostname> sshd[218709]: rexec line 46: Deprecated option RSAAuthentication
Jul 27 00:02:10 <hostname> sshd[218709]: rexec line 53: Deprecated option RhostsRSAAuthentication
Jul 27 00:02:10 <hostname> sshd[218709]: rexec line 57: Deprecated option RhostsRSAAuthentication
Jul 27 00:02:10 <hostname> sshd[218709]: rexec line 114: Deprecated option UseLogin

Cause

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In this Document
Symptoms
Cause
Solution
References


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