more containers, more security, OpenJDK 17 and .NET 6

Red Hat Enterprise Linux (RHEL) 8.5 It is now generally available as the latest stable version and for production of the well-known and reputed corporate distribution, which has been the medium that has made the company that develops it the leader in both economic and technological terms of the Linux spectrum.

RHEL 8.5 comes with some news of interest that mainly cover containers, greater facilities in management, security and updating support for development with Java and the framework .NET from Microsoft.

We begin with the provision of the RHEL 8 container image for Podman, which can be deployed in continuous integration and continuous delivery systems in the cloud, WSL 2 on Windows, the Docker application for macOS and RHEL versions 6, 7 and 8. This container image can help in the development and execution of other container images.

Another new feature of RHEL 8.5 is that it now handles check container image signatures by default to ensure that they have not been tampered with. This mechanism should offer confidence to users when extracting (doing pull) container images. To end the subject, the system in question improves performance when creating and running rootless containers with native OverlayFS support.

Automation is very important to Red Hat, so it’s no wonder RHEL 8.5 brings some improvements on this front. To start we have a hardware management module included in Ansible, which allows you to configure the Intelligent Platform Management Interface (IPMI) for things like the power state of a system and the boot order of devices.

Identification of performance problems through the web console has been improved. RHEL 8.5 can help detect performance problems at the CPU, disk or network level, as well as supporting easy export to a Grafana server. On the other hand, from this release it is possible to use system roles to configure a Postfix server or a VPN more quickly.

RHEL minor releases now have the ability to access hot patches for a period of six months after the release of a specific kernel version, offering more flexibility to customers as they strive to keep their RHEL implementations application-secure without rebooting security patches. The complexity of managing the kernel hot patch has been reduced because the task can be performed through the web console.

Access to user authentication records through the System Security Services Daemon (SSSD) has been improved to include details such as time to complete, errors, authentication flow, and configuration. Search capabilities have been built in to make it easier for administrators to analyze performance or configuration issues within the user authentication infrastructure.

Finishing with the improvements at the security level, we find the application of the NTS standard to provide cryptographic authentication of the NTP servers and thus avoid man-in-the-middle attacks.

Another aspect to highlight is the improved support for SQL Server. RHEL 8.5 has made available a role for Microsoft’s database management system that allows administrators to install, configure, and tune databases more quickly. On the other hand, the SQL Server Evaluation API for Red Hat Insights helps provide an optimal experience for administrators by providing Microsoft best practices for evaluating SQL Server configuration, as well as offering users capabilities to remediate discovered problems. via the API.

For software developers highlights support for recent OpenJDK 17 and .NET 6. Of the first, apart from all the new features and improvements that it has brought in itself, it is also available in RHEL’s Universal Base Image (UBI) container format, which offers developers new ways to test and update applications and to use OpenJDK in continuous integration and continuous delivery pipelines. From the latest version of the well-known framework Microsoft highlights the simplification of the C # and F # languages, a simplified cryptography and new APIs such as WebSocket.

Red Hat Enterprise Linux 8.5 is available through the Red Hat Customer Portal. Those who want to know all the details can check the official announcement and the release notes.

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