Oracle Linux 8.5, released in late 2021, represents a significant milestone in the evolution of enterprise-grade operating systems. Built on the foundation of Red Hat Enterprise Linux (RHEL) 8.5, it provides a 100% application-binary compatible
environment while offering unique enhancements tailored for high-performance workloads and cloud-native deployments. The Core Value: Unbreakable Enterprise Kernel (UEK)
The defining feature of the Oracle Linux 8.5 ISO is the inclusion of UEK Release 6
. Unlike standard distributions that stay on older kernels for stability, UEK brings modern features—such as improved support, enhanced security via Kernel Lockdown , and advanced
capabilities—without sacrificing reliability. This makes it particularly effective for running intensive database applications like Oracle DB. Key Features and Updates Application Streams:
This version utilizes "AppStream," allowing users to install multiple versions of the same software (like Python or MySQL) on a single system without version conflicts. Cockpit Web Interface:
Oracle Linux 8.5 features an enhanced Cockpit dashboard, making server management accessible via a web browser. This simplifies tasks like storage configuration, network monitoring, and log inspection for administrators of all skill levels. Security Enhancements: With support for
profiles and improved system-wide cryptographic policies, 8.5 ensures that enterprise environments meet modern compliance standards out of the box. Free Access:
One of its most compelling attributes is that the ISO is free to download, use, and distribute. Users receive enterprise-level updates without a mandatory subscription fee, though paid support remains an option for mission-critical deployments. The versatility of the 8.5 ISO makes it ideal for hybrid cloud
environments. Whether deployed on-premises, in the Oracle Cloud Infrastructure (OCI), or on other third-party clouds, it provides a consistent experience. It is the go-to choice for organizations looking to migrate away from CentOS while maintaining a RHEL-compatible ecosystem. Conclusion
Oracle Linux 8.5 is more than just a "clone." It is a specialized, performance-tuned distribution that bridges the gap between traditional data centers and modern cloud architecture. By integrating the Unbreakable Enterprise Kernel with RHEL’s stability, it offers a robust platform for modern digital transformation. VirtualBox VM using the Oracle Linux 8.5 ISO?
The Oracle Linux 8.5 ISO is a free, enterprise-grade operating system image based on the Red Hat Compatible Kernel (RHCK). Released in January 2022, it is part of the Oracle Linux 8 series which continues to receive support until July 2029. 💿 ISO Download Sources
You can download the ISO images without registration from several official Oracle channels:
Oracle Linux Yum Server: This is the fastest way to get recent ISOs directly.
Oracle Software Delivery Cloud: Provides a comprehensive list of all versions and architectures (x86_64 and aarch64).
Microsoft App Store: Specifically for the Windows Subsystem for Linux (WSL), allowing you to run Oracle Linux 8.5 directly on Windows. 🛠️ Types of ISO Images Available
Depending on your installation needs, Oracle provides different ISO variants: ISO Type Full ISO
Recommended for most on-premises installs; includes all repositories for offline setup. UEK Boot ISO
Used for installations requiring the Unbreakable Enterprise Kernel (UEK), such as when using the Btrfs file system. Boot ISO
A minimal image for network-based installations using the standard kernel (RHCK). Source ISO
Contains the source code for the software packages included in the release.
💡 Key Update: Starting with Oracle Linux 8.5, the Unbreakable Enterprise Kernel Release 7 (UEK R7) became an optional installation choice, though UEK R6 remained the default for this specific version. If you'd like, I can help you with:
Step-by-step installation instructions for a virtual machine Commands to verify the checksum of your downloaded ISO
Differences between RHCK and UEK kernels to help you choose the right boot image Oracle Linux ISOs | Oracle, Software. Hardware. Complete.
Oracle Linux 8.5: A Comprehensive Review
Introduction
Oracle Linux is a popular enterprise-grade Linux distribution that offers a robust and secure platform for organizations. The latest version, Oracle Linux 8.5, was released in October 2021, and it comes with a range of exciting features and enhancements. In this paper, we will provide an in-depth review of Oracle Linux 8.5, including its key features, installation process, and system requirements.
Overview of Oracle Linux 8.5
Oracle Linux 8.5 is a downstream version of Red Hat Enterprise Linux (RHEL) 8.5, which means that it is binary-compatible with RHEL. This compatibility ensures that Oracle Linux 8.5 can run RHEL applications and packages without any modifications. Oracle Linux 8.5 is designed to provide a stable and secure platform for organizations, with a focus on performance, scalability, and reliability.
Key Features of Oracle Linux 8.5
Some of the key features of Oracle Linux 8.5 include:
- Improved Security: Oracle Linux 8.5 includes a range of security enhancements, such as improved firewall configuration, enhanced auditing, and increased support for secure protocols.
- Enhanced Performance: Oracle Linux 8.5 offers improved performance, with optimized kernel and file system configurations.
- Increased Scalability: Oracle Linux 8.5 supports up to 256 CPU cores and 4TB of RAM, making it an ideal platform for large-scale deployments.
- Better Support for Cloud and Containerization: Oracle Linux 8.5 includes improved support for cloud and containerization technologies, such as Oracle Cloud Infrastructure and Docker.
- Updated Software Packages: Oracle Linux 8.5 includes updated software packages, including the latest versions of Python, Java, and GCC.
Installation Process
The installation process for Oracle Linux 8.5 is straightforward and easy to follow. The installation ISO image can be downloaded from the Oracle website, and it can be used to create a bootable USB drive or DVD. The installation process involves the following steps:
- Boot from the Installation Media: Boot the system from the installation media, and select the installation language and keyboard layout.
- Select the Installation Type: Select the installation type, such as Server or Workstation.
- Configure the Network: Configure the network settings, including the hostname, IP address, and DNS settings.
- Configure the Storage: Configure the storage settings, including the disk layout and file system type.
- Install the Operating System: Install the operating system, which will take several minutes to complete.
System Requirements
The system requirements for Oracle Linux 8.5 are as follows:
- CPU: 64-bit processor, such as x86-64 or Arm64
- Memory: 2GB of RAM (minimum), 4GB of RAM (recommended)
- Storage: 10GB of free disk space (minimum), 20GB of free disk space (recommended)
- Network: Network interface card (NIC) with a supported driver
ISO Image Details
The Oracle Linux 8.5 ISO image is a single image that can be used for both 64-bit and Arm64 architectures. The ISO image is approximately 10GB in size, and it includes the following files:
- boot.iso: The bootable ISO image that can be used to install Oracle Linux 8.5.
- OracleLinux-8.5-BaseOS-*.iso: The base OS ISO image that includes the core operating system packages.
- OracleLinux-8.5-AppStream-*.iso: The appstream ISO image that includes additional packages and applications.
Conclusion
Oracle Linux 8.5 is a robust and secure enterprise-grade Linux distribution that offers a range of exciting features and enhancements. Its improved security, performance, and scalability make it an ideal platform for organizations. The installation process is straightforward, and the system requirements are minimal. The ISO image is easy to download and use, and it includes a range of files that can be used to install and configure the operating system.
References
- Oracle Corporation. (2021). Oracle Linux 8.5 Release Notes. Retrieved from https://docs.oracle.com/en/operating-systems/oracle-linux/8.5/release-notes-ol8.5.html
- Oracle Corporation. (2021). Oracle Linux 8.5 Installation Guide. Retrieved from https://docs.oracle.com/en/operating-systems/oracle-linux/8.5/install-guide/index.html
Appendix
The following is a list of common commands used in Oracle Linux 8.5:
- dnf: The package manager used in Oracle Linux 8.5.
- yum: The legacy package manager used in Oracle Linux 7 and earlier.
- systemctl: The command used to manage services and system settings.
- journalctl: The command used to view system logs.
Some common dnf commands include:
- dnf install: Install a package or group of packages.
- dnf update: Update the system and packages.
- dnf remove: Remove a package or group of packages.
- dnf list: List available packages and repositories.
Some common systemctl commands include:
- systemctl start: Start a service.
- systemctl stop: Stop a service.
- systemctl restart: Restart a service.
- systemctl status: View the status of a service.
Conclusion
The Oracle Linux 8.5 ISO offers a stable, secure, and cost-effective foundation for enterprise workloads. Whether you’re running a three-node Oracle RAC database, a Kubernetes cluster, or a simple LAMP stack, this distribution delivers enterprise polish without the price tag.
By following the steps above—from verifying the ISO checksum to post-install kernel tuning—you’ll transform a raw ISO file into a production-ready server. And because Oracle maintains binary compatibility with RHEL, you’re never locked into a single vendor.
Ready to get started? Head over to yum.oracle.com and download the official Oracle Linux 8.5 ISO today. Deploy it on bare metal, in virtual machines, or in the Oracle Cloud—the choice is yours, and the power is free.
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Oracle Linux 8.5 was released in November 2021 as a significant update to the Oracle Linux 8 series. As an enterprise-class operating system, it maintains application binary compatibility with Red Hat Enterprise Linux (RHEL) 8.5 while offering unique Oracle-specific enhancements like the Unbreakable Enterprise Kernel (UEK). Key Features and Updates
Unbreakable Enterprise Kernel (UEK) R6: This release prominently features UEK Release 6, based on the mainline Linux 5.4 kernel. It also introduced the option to install UEK R7 for users requiring newer kernel features.
Enhanced Performance Management: Includes the schedutil CPU frequency governor for both the Red Hat Compatible Kernel (RHCK) and UEK R6, which better manages CPU frequency based on system load data.
Developer Toolset Updates: Several core tools received version bumps, including Go 1.16.6, Rust 1.54.0, LLVM 12.0.1, and CMake 3.20.2.
High Availability Improvements: New pcs commands were added for cluster setup and updating SCSI fencing devices without restarting all resources.
Security: Includes live kernel and user-space patching to improve security and availability without reboots. Understanding ISO Variants
When downloading Oracle Linux 8.5, you will typically find several types of ISO images on the Oracle Linux yum server or the Oracle Software Delivery Cloud:
Full ISO: Contains all packages required for a complete installation without needing an internet connection during the process.
UEK Boot ISO: A smaller image used to boot the system with the Unbreakable Enterprise Kernel to start a network-based installation.
Boot ISO: Similar to the UEK Boot ISO but utilizes the Red Hat Compatible Kernel (RHCK) for the installation environment.
Source ISO: Contains the source code for the packages included in the Full ISO. Installation Requirements
To install Oracle Linux 8.5 on a physical or virtual machine, the following minimum specifications are generally recommended: Processor: 2 logical CPUs or cores.
Memory: At least 1.5 GB RAM (2 GB or more is recommended for GUI environments).
Disk Space: Minimum 10 GB, though 20 GB is suggested for standard server use. Oracle Linux ISOs | Oracle, Software. Hardware. Complete.
Oracle Linux 8.5 is an enterprise-grade operating system designed for high performance and hybrid cloud flexibility. It is 100% application binary compatible with Red Hat Enterprise Linux (RHEL), allowing you to run RHEL-certified applications without modification while benefiting from Oracle-specific optimizations. Key Features of the 8.5 Release
Kernel Options: Shipped with the Red Hat Compatible Kernel (RHCK) and the Unbreakable Enterprise Kernel Release 6 (UEK R6). Notably, Oracle Linux 8.5 was the first to offer UEK R7 as an optional installation.
Infrastructure Updates: Includes updates to core tools like chrony (v4.1) for time synchronization, PowerTop (v2.14) for power management, and linuxptp (v3.1).
Security & Compliance: Features the udica package for tailored container security policies and updates to SELinux tools (v2.9).
Enhanced Performance: Introduces 5-level paging to extend memory bus limits for massive physical and virtual memory addressing. Oracle Linux ISOs | Oracle, Software. Hardware. Complete.
Security and Compliance: What 8.5 Offers
When you deploy an ISO, you inherit the security posture of that version. Oracle Linux 8.5 introduced fapolicyd (File Access Policy Daemon) by default. This is a kernel-level application whitelisting tool—similar to SELinux but focused on executables.
To check if fapolicyd is running:
sudo systemctl status fapolicyd
Additionally, 8.5 includes the OpenSCAP suite by default. You can scan your machine against a DISA STIG or CIS profile:
sudo oscap xccdf eval --profile cis --report scan-report.html /usr/share/xml/scap/ssg/content/ssg-ol8-ds.xml
1. Overview
Oracle Linux 8.5 (Update 5) is a stable, production-ready enterprise Linux distribution, fully binary-compatible with Red Hat Enterprise Linux (RHEL) 8.5. It is available for x86_64 (64-bit) and ARM (aarch64) architectures.
Key highlights:
- Includes the Unbreakable Enterprise Kernel (UEK) Release 6 (UEK R6) as the default kernel.
- Also includes the Red Hat Compatible Kernel (RHCK) for maximum compatibility.
- Supports container workloads, cloud deployments, and on-premises servers.
Burning the ISO or Creating Bootable Media
Once you have the ISO file, you need to make it bootable.
