Oracle Linux 9.3 Release: Enhanced Security and Compatibility Features

Oracle Linux 9.3 Release: Enhanced Security and Compatibility Features

On November 21, Oracle officially released version 9.3 of Oracle Linux, an enterprise-level Linux distribution supported by Oracle and generated from the source code of Red Hat Enterprise Linux (RHEL).

The release includes significant updates such as the enforcement of SHA-2 algorithm for OpenSSH keys and 100% application binary compatibility with RHEL.

Oracle Linux 9.3 Release: Enhanced Security and Compatibility Features

Oracle Linux 9.3 is declared compatible with 64-bit Intel, AMD (x86_64), and 64-bit Arm (aarch64) platforms. It ensures binary compatibility to prevent application disruptions. Oracle emphasizes that the source code, binary files, ISO, and more remain unrestricted and can be obtained from the Oracle Linux yum server.

Key features of Oracle Linux 9 Update 3 include the Unbreakable Enterprise Kernel (UEK) for x86_64 and aarch64 architectures, version UEK Release 7 Update 2 (5.15.0-200.131.27), based on Linux Kernel 5.15. It also supports both Oracle Linux 9 and Oracle Linux 8. Additionally, the Red Hat RHEL-compatible kernel (RHCK) for x86_64 architecture is present with version 5.14.0-364.

Notable changes include the ability to automatically restart the system after patch installation using DNF, with users having options to control the automatic restart behavior (never, upon changes, or when needed). OpenSSH now mandates the use of the SHA-2 algorithm for key testing, preventing systems running Oracle Linux 9.3 from using SHA-1 on the client side and addressing vulnerabilities associated with SHA-1.

Oracle Linux 9.3, featuring UEK R7U2, continues to maintain and support the btrfs file system, providing access to one of the most modern Copy-On-Write (COW) file systems on Linux.

In terms of compilers and development tools, Oracle Linux 9.3 has adjusted glibc to enhance the performance of Intel Xeon V5 hardware.

About Oracle Linux.

Oracle Linux is an enterprise-class operating system designed for businesses and organizations.

It is developed and supported by Oracle Corporation, a global technology company known for its database management systems, cloud services, and enterprise software.

Oracle Linux is built based on the open-source code of Red Hat Enterprise Linux (RHEL), with additional enhancements and optimizations by Oracle.

Key features and aspects of Oracle Linux include:

Compatibility with RHEL: Oracle Linux maintains binary compatibility with RHEL, allowing users to leverage applications and solutions developed for RHEL seamlessly.
Unbreakable Enterprise Kernel (UEK): Oracle Linux includes the Unbreakable Enterprise Kernel, which is optimized for performance, scalability, and reliability. It often incorporates the latest features from the upstream Linux kernel.
Security Enhancements: Oracle Linux prioritizes security, as evidenced by features like the enforcement of strong cryptographic algorithms (such as SHA-2) for key management in components like OpenSSH.
Btrfs File System Support: Oracle Linux supports the Btrfs (B-tree file system) for certain configurations. Btrfs is a modern file system that includes features like snapshots, compression, and copy-on-write functionality.
Automatic Patch Management: Oracle Linux provides tools like DNF (Dandified YUM) for package management. In Oracle Linux 9.3, there’s an added capability to automatically restart systems after patch installation, providing a streamlined approach to patch management.
Platform Support: Oracle Linux is compatible with various hardware architectures, including 64-bit Intel, AMD (x86_64), and 64-bit Arm (aarch64).
Performance Tuning: The operating system undergoes optimizations to enhance performance on specific hardware platforms, such as improvements to the GNU C Library (glibc) for better performance on Intel Xeon V5 hardware.
Open Source Philosophy: While Oracle Linux includes proprietary components, it maintains an open-source philosophy. Users can access the source code, binary files, and other resources freely from Oracle’s repositories.

Organizations often choose Oracle Linux for its combination of enterprise-grade support, compatibility with key applications, and the additional features and optimizations provided by Oracle.

It’s particularly well-suited for environments where Oracle database solutions are prevalent, given the synergies between Oracle’s software offerings and the Linux operating system.