Author: Arun Reddy
IT Professional with over 18 years of experience in various Infrastructure technologies.


Jul 2019

Requesting and Deploying SSL Certs with additional SAN and Custom Key Usage

Requirement: In most projects, SSL has become mandatory for deploying enterprise applications. Application URLs might have multiple aliases or CNames or VIP Names which point to the same back end application or web servers. In such cases, you want to request an SSL Certificate with Additional SAN (Subject Alternate Names). Also when implementing two-way SSL […]


Sep 2018

OIM/OAM 12c RCU Creation failed for Oracle DB12c

Issue: When we run the RCU utility to create the OIM/OAM Schemas, the following error is encountered Mon Sep 24 23:36:02.696 UTC 2018 ERROR assistants.rcu.backend.task.PrereqTask: oracle.sysman.assistants.rcu.backend.task.PrereqTask::execute: Prereq Evaluation Failed oracle.sysman.assistants.rcu.backend.validation.PrereqException: ERROR – RCU-6083 Prerequisite check failed for selected component: CAUSE – RCU-6083 Prerequisite check failed for selected component. ACTION – RCU-6083 Refer to the RCU […]


Sep 2018

Increase the swap space EC2 Instance

Issue: If you are on a EC2 micro instance and constantly running out of memory or need additional swap space for your application requirements such as Oracle DB, Oracle UCM or SOA, you can follow the below Instructions to increase the swap space (default is zero)   Resolution:   Login to your EC2 Instance and […]


Sep 2018

Ports on AWS EC2 Instance gets blocked after the reboot

  Issue:   If you are working on AWS EC2 RHEL Instance version 7+ , you might notice that when the server is restarted, you’ll no longer have connectivity to the custom TCP ports from outside even if you have the Security Group with valid inbound and outbound rules   Root Cause:   If you […]


Jun 2018

Quick guide to installing ORDS with weblogic and enable default OAuth2.0 security

Download the binaries from oracle site ( Unzip the binaries in a directory where you have the weblogic running Run the following command to install the ords /opt/oracle/product1213/jdk1.8.0_161/bin/java -jar ords.war install advanced Enter the name of the database server [localhost] Enter the database listen port [1521]:<Enter unless port is different> Enter 1 to specify the […]


Jan 2017

Quick Start to Safenet SA5 HSMs – Part1

Below is a quick start guide to setting up your Safenet (Luna) SA5 network attached Hardware Security Modules (HSMs)   Note: First step is to connect to the HSM using a serial Interface and putty (8N1, 115200). Default user/password are ADMIN/PASSWORD   Configure Luna SA Networking   Command   Notes/Comments lunash:> sysconf timezone set US/Central […]


Jan 2017

Webex Plug-In not getting Installed on new macOS Sierra

Issue: Cisco Webex Add on Plug-in fails to install on the new mabook pro with macOS Sierra. It doesn’t give an error but it silently fails without installing the webex plug-in   Resolution:Open up the terminal window on your mac and create the below directory. mkdir ~/Library/Internet\ Plug-Ins After the directory is created, run the […]


Dec 2016

Register/unregister Oracle Web Tier Instances with Oracle Weblogic Domain

Follow the below steps to associate your web tier instances with the corresponding Oracle WebLogic domain. Once the OHS Instances are linked to the domain, they can be managed and monitored via the Oracle Fusion Middleware console. Most of the configuration changes can be made through the console   To register the Oracle web tier […]


Sep 2016

Print OAM/HTTP Headers on Oracle HTTP Server 11g (OHS)

Issue: When troubleshooting Single Sign-On (SSO) issues or OAM SAML Assertion issues in OHS 11G, it is very useful to capture the HTTP Headers being passed to the web servers. By default OHS 11G servers have a perl script we can invoke to print the HTTP Headers.   Default URL: http://hostname.domain:port/cgi-bin/printenv   When invoking the […]


Aug 2016

Configure Log Rotation and Retention for OUD (Oracle Unified Directory) Servers

Oracle Unified Directory provides several types of logs: access logs, audit logs, error logs, debug logs, and a replication repair log. As an administrator, it is important for you to set right rotation and retention policies so that the file systems don’t become 100% utilized   To check the current list of log files enabled […]