At the Red Hat annual summit the main planned features of RHEL 7.4 were disclosed. You can find them in a dedicated page. In addition, as of today, the RHEL 7.4 Beta has been released. Also, new interesting Red Hat summit…
The annual Red Hat summit 2017 happened last week. The first videos are available on the Red Hat summit channel on Youtube. Besides presentations you can also practice through: a lab about containerizing applications, a lab about container internals, an OpenShift demo about…
Until recently I didn’t know what was exactly the Cockpit project. I thought it was a new complicated panel for administrators looking for a GUI. Difficult to install, to maintain, to understand … In fact, it is just the contrary:…
NetworkManager big update From RHEL 7.2 to RHEL 7.3, NetworkManager moved from v1.0.6 to v1.4.0: a lot of things have changed. Color is everywhere! NetworkManager now uses colors to match the status of a device or a connection and sorts…
Since RHEL 6, CGroups have been a work in progress. So, in RHEL 7 features evolved through new Systemd commands like systemd-cgls, systemd-cgtop, and mainly systemctl set-property. Still through Systemd, RHEL 7.0 brought the CPUShares (percentage of CPU), MemoryLimit (memory…
Several technical articles were recently published: Do we really need swap in modern systems?, Avoiding clock drift in VMs, What capabilities an application requires to successfully run in a container, Kernel patching with kexec: updating a CentOS 7 kernel without a…
Several very interesting articles were recently posted by Red Hat employees: Performance Analysis with Performance Co-Pilot by Terry Bowling, Spring Cloud for Microservices Compared to Kubernetes by Bilgin Ibryam, Configuring and Using Persistent Memory in RHEL 7.3 by Jeff Moyer. In addition, after a few…
More than a month after the announcement of RHEL 7.3, it is now time for the release of CentOS 7.3, also called CentOS 7 (1611). In the Releases Notes appear the following major changes: Support for the 7th-generation Core i3,…
Through this website I get feedback from many people taking Red Hat exams. Hopefully, concerning the RHCSA exam, a lot of them pass it with flying colors but some fail too. So I get a good idea of the reasons why failure…
From RHEL 7.0 to RHEL 7.2, Firewalld didn’t really evolve (v0.3.9.7 -> v0.3.9.14). It was mainly a matter of bug fixes. As usual with RedHat, Systemd already showed it, new Firewalld features are triggered by backport difficulties: as new bugs are found, fixes…
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