Follow these three simple steps to change the root password in Oracle Linux:

1. Boot the computer with Linux Installation DVD.

Follow the below mentioned steps to upgrade from R12.2.2 to R12.2.3

Database TierStep 1 - Download and Apply following patches (if you are on StartCD 12.2.0.46):

Run the following post installation steps:1.5.1 Synchronize File Systems

1.5.1.1 Synchronize the file systems using the command shown below. This action will copy the new run edition code and configuration to the other file system, to help the next online patching cycle complete faster.

Run the following post installation steps:1.4.1 Applying the 12.2.2 AD and TXK Release Update Pack

1.4.1.1 Apply following patches from ‘applvis’ user in Application Tier:• Patch 15955263 - Oracle Applications DBA 12.2.2 Product Release Update Pack (R12.AD.C.Delta.2)• Patch 15955263• Patch 15946788

Run the following post installation steps:1.3.1 Run Scripts to find out RUN and PATCH File System and Application Environment

1.3.1.1 Create custom application directory.