Oracle Linux 8.5 Iso -
📊 In benchmarks (Phoronix-style), Oracle Linux 8.5 with UEK sometimes matches or beats RHEL 8.5, but not dramatically so.
sudo dd if=OracleLinux-8.5-x86_64-dvd.iso of=/dev/sdX bs=4M status=progress
(Replace /dev/sdX with your actual USB device identifier.)
Getting Started with Oracle Linux 8.5: Performance and Stability
Oracle Linux 8.5, released in late 2021, continues Oracle's tradition of providing a high-performance, Red Hat Enterprise Linux (RHEL)-compatible
operating system designed for demanding enterprise workloads. Whether you are looking for a stable foundation for an Oracle Database or a versatile platform for cloud-native applications, the Oracle Linux 8.5 ISO is the gateway to a robust infrastructure. Key Features and Enhancements
Oracle Linux 8.5 introduced several notable updates to improve management, security, and developer productivity: Kernel Options : Includes the Unbreakable Enterprise Kernel (UEK) Release 6 Update 3 (5.4.17) and the Red Hat Compatible Kernel (RHCK) (4.18). Security & Compliance : Features CVE-2022-0185
kernel mitigations and ongoing monthly updates for security patches. System Management : Enhancements to tools like Relax-and-Recover (ReaR)
for better detection of thin pools and logical volumes during restoration. Application Streams
: Continues to provide multiple versions of user space components (databases, languages, etc.) that can be updated independently of the core OS. ISO Download Options
You can obtain Oracle Linux 8.5 installation media in several formats to suit your deployment needs:
: The most common download, containing all packages needed for a typical on-premises installation : A smaller image for network-based installations. UEK Boot ISO
: Specifically designed to boot hardware that is only supported by the Unbreakable Enterprise Kernel Source ISO
: Contains the source code for the packages included in the release. How to Obtain the ISO Oracle Linux ISOs | Oracle, Software. Hardware. Complete.
The Oracle Linux 8.5 ISO serves as the gateway to a robust, enterprise-grade operating system designed for mission-critical workloads. Released on May 9, 2022, version 8.5 introduced significant enhancements to security, automation, and performance. It is 100% application binary compatible with Red Hat Enterprise Linux (RHEL), making it a popular choice for those needing a stable EL-based environment without mandatory subscription costs. Key Features of Oracle Linux 8.5
Oracle Linux 8.5 bridges the gap between traditional enterprise stability and modern cloud-native flexibility.
Dual Kernel Support: By default, Oracle Linux 8.5 ships with the Unbreakable Enterprise Kernel (UEK) Release 6, which is optimized for Oracle hardware and software. It also includes the Red Hat Compatible Kernel (RHCK) for maximum compatibility with RHEL-certified applications.
Security & Compliance: This release features OpenSSH 7.8p1 and LUKS2 as the default disk encryption format. It is also certified for stringent standards like FIPS 140-3 and Common Criteria.
Networking Improvements: The nftables framework replaces iptables, providing better performance and packet classification.
Zero-Downtime Patching: Users with Oracle Premier Support gain access to Ksplice, allowing them to apply kernel and user-space security updates without rebooting the system. Where to Download the Oracle Linux 8.5 ISO
Oracle provides several official mirrors to download the installation media for free: Oracle Linux ISOs | Oracle, Software. Hardware. Complete.
Oracle Linux 8 Update 5 (8.5) is a versatile operating environment designed for modern data centers and cloud infrastructures. Based on Red Hat Enterprise Linux (RHEL) 8.5, it is 100% application-binary compatible while offering unique performance and security enhancements through the Unbreakable Enterprise Kernel (UEK) oracle linux 8.5 iso
Below is a complete breakdown of the key features and capabilities of the Oracle Linux 8.5 ISO. Core Kernel & Performance
Oracle Linux 8.5 offers two kernel choices to balance stability and bleeding-edge performance: Unbreakable Enterprise Kernel (UEK) Release 6
: The default kernel (5.4-based) optimized for Oracle hardware and software. It includes enhancements for NVMe, file systems like Btrfs, and security. Red Hat Compatible Kernel (RHCK)
: Provides identical behavior to the RHEL kernel for users requiring strict upstream parity. eBPF Support
: Full support for Extended Berkeley Packet Filter (eBPF), allowing for high-performance system tracing, networking, and security monitoring without modifying the kernel. Security & Compliance Kernel Lockdown
: Prevents unauthorized modifications to the running kernel image, even by the root user, reducing the attack surface. OpenSCAP Enhancements
: Updated security profiles and scanning tools to ensure the system meets industry standards like PCI-DSS and STIG. System-Wide Crypto Policies
: Centrally manage cryptographic algorithms across all applications (e.g., SSH, TLS, IPsec) with a single command. NSS Support for TLS 1.3
: Improved security for web communications and internal services. Developer & Application Tools Oracle Linux 8.5 uses the Application Streams (AppStream)
model, allowing different versions of software to run on the same OS: Updated Languages
: Includes the latest versions of Java (OpenJDK 17), Python 3.9, PHP 7.4, and Ruby 3.0. Database Support
: Optimized out-of-the-box for Oracle Database installations with the oracle-database-preinstall-8c GCC Toolset 11
: Provides the latest compiler features for C and C++ developers. Management & Automation Cockpit Web Interface
: A powerful, browser-based dashboard for managing servers, monitoring performance, and configuring storage or networking. Ansible Integration
: Native support for automation playbooks to streamline large-scale deployments. Dnf (YUM v4)
: A faster, more efficient package manager with improved dependency resolution. Virtualization & Containers Podman, Buildah, and Skopeo
: A daemon-less container engine suite that replaces Docker, allowing for more secure, rootless container management. KVM Support
: Updated virtualization features for hosting high-performance virtual machines. Availability & Support Zero-Downtime Patching : Available via Oracle Ksplice
, which allows you to apply critical kernel and user-space patches without rebooting the system (requires a support subscription). Free to Download : The ISO is free to download, use, and distribute via the Oracle Software Delivery Cloud Oracle Linux yum server If you're planning an installation, I can help you with: hardware requirements installation steps using the Anaconda installer switch from RHEL or CentOS to Oracle Linux 8.5 seamlessly
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 Filesystem: XFS default; UEK’s Btrfs is optional but
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 a major update within the Oracle Linux 8 release cycle, designed to provide a highly secure, stable, and performant environment for enterprise workloads. It is 100% application binary compatible with Red Hat Enterprise Linux (RHEL). Released in November 2021, this version introduced critical updates to the Unbreakable Enterprise Kernel (UEK), enhanced system security, and updated developer toolsets. Core Features of Oracle Linux 8.5
Oracle Linux 8.5 focuses on bridging modern cloud-native capabilities with traditional on-premises stability.
Dual Kernel Support: The installation image includes both the Unbreakable Enterprise Kernel Release 6 (UEK R6) and the Red Hat Compatible Kernel (RHCK). While UEK R6 was the default, Oracle Linux 8.5 also introduced the option to install UEK R7 for advanced high-throughput and low-latency networking.
Security & Compliance: This release features live kernel and user-space patching through Ksplice, allowing for security updates without reboots. It also adheres to leading FIPS and Common Criteria certifications to ensure enterprise-level compliance.
Developer Toolsets: Major updates were made to programming languages and system utilities, including: Go Toolset updated to 1.16.6. Rust Toolset updated to 1.54.0. LLVM Toolset updated to 12.0.1. CMake updated to 3.20.2. GCC Toolset 11 with DWARF 5 support.
Performance Monitoring: Performance Co-Pilot (PCP) was updated to version 5.3.1, along with updates to the Grafana package for advanced system visualization. Downloading the Oracle Linux 8.5 ISO
Oracle Linux is free to download, use, and distribute. You can obtain the ISO images from several official sources: Oracle Linux ISOs | Oracle, Software. Hardware. Complete. 📊 In benchmarks (Phoronix-style), Oracle Linux 8
mkdir /mnt/iso
mount -o loop OracleLinux-8.5-x86_64-dvd1.iso /mnt/iso
Create a repo file: /etc/yum.repos.d/local.repo
[local-baseos] name=Local Oracle Linux 8.5 BaseOS baseurl=file:///mnt/iso/BaseOS enabled=1 gpgcheck=0
[local-appstream] name=Local Oracle Linux 8.5 AppStream baseurl=file:///mnt/iso/AppStream enabled=1 gpgcheck=0
Now you can run dnf install without a network.
The Oracle Linux 8.5 ISO is more than just a point release—it is a stable, battle-tested foundation for enterprise computing. Whether you are deploying a high-frequency trading system, an Oracle Real Application Clusters (RAC) database, or a simple web server, this version offers the perfect balance of modern features (like cgroups v2 for containers) and rock-solid predictability.
By downloading the ISO from the official Oracle Software Delivery Cloud, verifying the checksum, and following the installation and post-setup steps outlined above, you ensure a secure, compliant, and high-performance environment. Oracle Linux is free to use, free to distribute, and with the 8.5 ISO, you have the keys to an operating system that powers some of the world's most critical workloads.
Ready to get started? Head to edelivery.oracle.com, search for "Oracle Linux 8.5," and begin your installation today.
Have questions or run into an issue? The Oracle Linux community forums and the official Oracle Linux yum mailing list are excellent resources for troubleshooting your specific ISO deployment.
The Oracle Linux 8.5 Full ISO (approximately 8.6 GB) is a comprehensive installation image that includes all the packages required for a complete system setup without needing an active internet connection. It is designed for both x86_64 and ARM64 (aarch64) architectures and is based on the Red Hat Enterprise Linux (RHEL) 8.5 package base. Key Features of Oracle Linux 8.5 Dual Kernel Options:
Unbreakable Enterprise Kernel (UEK) Release 6: Based on the Linux 5.4 mainline kernel, optimized for enterprise workloads and Oracle software.
Red Hat Compatible Kernel (RHCK): Based on the Linux 4.18 kernel to maintain strict compatibility with RHEL 8.5.
Advanced File Systems: Support for Btrfs and OCFS2 is fully enabled when using the UEK kernel. Enhanced Performance & Security:
Live Patching: Ability to update the kernel and user-space without rebooting the system.
RDMA Support: High-throughput, low-latency networking for clusters.
Security Compliance: Includes tools like OpenSCAP and support for UEFI Secure Boot.
Management Tools: Features the Cockpit web console for simplified server management and monitoring. Installation Requirements
For a full feature installation (Server with GUI), the following minimum hardware is recommended: Oracle Linux ISOs | Oracle, Software. Hardware. Complete.
To create a bootable USB drive, follow these steps:
| User type | Experience |
|-----------|------------|
| Sysadmin | Almost identical to RHEL. Oracle adds oracle-database-preinstall and oracle-rdbms-server-12cR1-preinstall RPMs – useful for DBAs. |
| Developer | Good – EPEL works, Docker/Podman supported. Ksplice for zero‑downtime kernel updates (paid). |
| Home / lab user | Free (GPL), no registration needed. But community smaller than CentOS/Alma/Rocky. Some docs assume you have Oracle support. |
| Enterprise | Great if you use Oracle DB, Oracle Cloud, or want 24×7 support from Oracle. |
⚠️ Note – The ISO alone works standalone; you do not need an Oracle Support contract to install or get errata (public yum repos exist).