To avoid malware or license violations, always download directly from Oracle.
| Issue | Solution | | :--- | :--- | | Download link 404s | Clear browser cache; Oracle periodically moves older versions to the "Oracle Software Delivery Cloud" archive. | | RPM dependency missing ( libaio , libnsl ) | Run sudo dnf install libaio libnsl before installation. | | Port 1521 already in use | Change listener port in /opt/oracle/product/23c/dbhomeFree/network/admin/listener.ora . | | Insufficient shared memory on Linux | Add kernel.shmall and kernel.shmmax to /etc/sysctl.conf and run sysctl -p . |
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Before downloading, ensure your system meets these minimum requirements (for Oracle XE): To avoid malware or license violations, always download
End of paper
For decades, Oracle Database has been the gold standard for enterprise data management. However, its commercial licensing has often placed it out of reach for learning, prototyping, and light production use. To address this gap, Oracle offers tier products. As of 2026, the primary free version is Oracle Database 23c Free , which succeeded the older Oracle Database 11g/18c XE (Express Edition). This paper focuses on the modern 23c Free release. | | Port 1521 already in use |
| Component | Requirement | | :--- | :--- | | | 2 GB minimum (4+ GB recommended) | | Disk Space | 10 GB minimum (for software + starter DB) | | OS (Linux) | Oracle Linux 7/8/9, RHEL 7/8/9, Ubuntu 20.04/22.04 | | OS (Windows) | Windows 10/11 Pro/Enterprise, Windows Server 2019/2022 | | Architecture | 64-bit only |
Before downloading, verify your environment meets these minimums:
sudo /etc/init.d/oracle-free-23c configure