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What is [CentOS alternative] Oracle Linux? [RHEL Compatible]

Updated: Apr 29, 2022

Hello everyone!

This is Jon from Beyond GTA Inc, and today I would like to introduce an interesting topic about Oracle Linux. Since most engineers are very familiar with CentOS and love to use them, I believe AlmaLinux will become one of their favourite one soon as well.


It seems that " AlmaLinux " is regarded as the future standard and promising as a Linux distribution to replace CentOS, which also summarized " Oracle Linux ".

Oracle Linux is 100% application binary compatible with Red Hat Enterprise Linux (RHEL) and is free to download, use, distribute and update.

* If you need OS support for Oracle Linux, you will be charged separately.

It provides excellent performance and security for hybrid and multi-cloud deployments and supports DTrace, clustering tools, Spacewalk, Oracle Enterprise Manager, and more.

An Oracle Linux Support subscription gives you access to Oracle support resources, Linux support specialists, zero downtime patches by Ksplice, cloud-native tools such as Kubernetes, KVM virtualization, and oVirt-based virtualization managers.



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Oracle Linux provides advanced features for optimizing application development and deployment. It is the only autonomous operating environment that can extend the autonomous features enhanced by Oracle Autonomous Linux to Linux, significantly reducing complexity and human error and increasing availability.



Ksplice Zero Downtime Update

Available to Oracle Linux Premier Support customers, Ksplice technology updates kernel hypervisors and critical user space libraries without rebooting or interruption.

Ksplice's known exploit detection enables auditing and alerting of known elevated privilege vulnerabilities. Only Oracle Linux provides this unique feature, allowing it to handle critical kernel and user space updates without operational costs or interruptions in reboots with each update.

Security and compliance

​Oracle Linux 7 is both Common Criteria (CC) certified and FIPS 140-2 certified for cryptographic modules.

Oracle implements the published Security Technology Implementation Guide (STIG) in the form of Security Content Automation Protocol (SCAP).

XFS file system

​XFS is a journaling file system known for its extremely high scalability with near-native I / O performance.

XFS is the default file system for Oracle Linux 7 and 8.

Oracle Linux has two kernel choices: the Unbreakable Enterprise Kernel (UEK) , which is installed and enabled by default, and the Red Hat compatible kernel.

UEK provides stability, scalability and performance, including Oracle Database, while UEK tracks the latest Linux kernel releases and provides binary compatibility with applications certified to run on Red Hat Enterprise Linux (RHEL). Designed for the enterprise workloads you need.

Running Oracle Linux with UEK provides additional advanced features and security enhancements such as:



Unbreakable Enterprise Kernel (UEK)

​UEK for Oracle Linux provides the latest open source innovations and business-critical performance and security optimizations for cloud-on-premises deployments.

UEK Release 6, which is based on mainline Linux kernel version 5.4, is available for Oracle Linux 7 and 8. This release also includes many upstream extensions.

Containers and orchestration

Oracle Linux Cloud Native Environment is an integrated suite for developing and managing cloud native applications.

Based on the Open Container Initiative and the Cloud Native Computing Foundation (CNCF) standard, the Oracle Linux Cloud Native Environment provides a simplified framework for installing, updating, upgrading, and configuring key features for coordinating microservices. Offers.


A comprehensive dynamic tracing framework that provides a powerful infrastructure that enables administrators, developers, and service personnel to answer any question about operating system and user program behavior in real time and concisely.

Persistent memory (PMEM)

Oracle provides the latest full set of Linux PMEM support for Oracle Linux 7 and later with UEK Release 5.

AMD Secure Memory Encryption (SME)

Starting with UEK Release 5, Oracle Linux enables hardware-accelerated memory encryption available on AMD EPYC processor-based systems to protect data in use.


The Btrfs file system is designed to meet the growing scalability requirements of high capacity storage subsystems for Linux.

It provides copy-on-write function, checksum function, transparent compression, transparent optimization, and integrated logical volume management.

Oracle Cluster File System 2 (OCFS2)

​OCFS2 is a general-purpose extent-based clustered file system developed by Oracle that has contributed to the Linux community.

It provides high performance and high availability, and provides an open source enterprise-class alternative to your own cluster file system.

Data integrity

Oracle Linux supports the T10 Protection Information Model (T10-PIM) to prevent silent data corruption.


Oracle Linux has a higher performance and enterprise-friendly impression than other Linux distributions. It seems to be suitable for use as an OS

This blog post is translated from a blog post written by Ohara Yuya on our Japanese website Beyond Co..

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