unzip p6810189_10204_Linux-x86-64.zip cd 6810189 ./opatch apply
10.2.0.5 does not support RHEL 6/7/8, Windows Server 2012/2016/2019/2022, or Solaris 11/11.4 natively. You may experience glibc mismatches and process crashes. Oracle Database 10g Release 2 10.2.0.5 Download
This distinction is critical. Most searches for "Oracle 10g 10.2.0.5 download" fail because users expect a full base installer, whereas Oracle intended 10.2.0.5 to be applied over a base 10.2.0.1 or 10.2.0.4 installation. unzip p6810189_10204_Linux-x86-64
If you are a student or researcher:
As of 2025, the only source for Oracle 10g Release 2 software (including 10.2.0.5) is the Oracle Software Delivery Cloud (edelivery.oracle.com). However, access is restricted. Windows Server 2012/2016/2019/2022