Everything started in 2009, when two researchers from the MIT, J.Arnold and F.Kaashoek, wrote an academic paper about “Automatic Rebootless Kernel Updates”. In this paper, they explained the state of the art in kernel hot patching and what approaches they took…
With RHEL7, RedHat decided to stop any 32-bit version of its distribution. Anticipating the market evolution, the company is now working on a 64-bit ARM architecture called AArch64. Yesterday, Jon Masters, RedHat ARM architect, gave a conference showing a demo of…
To those who are wondering if they will have time to take their exams before the arrival of the RHEL 7 certification program, RHCSA & RHCE exams for RHEL 6 are still scheduled in Europe until december 12, 2014. Source:…
In RHEL 6, service management was sometimes slightly painful. Each time you wanted to start or enable a service, you had to perfectly remember its name. For example, when you wanted to set up a ntp client, you had to…
For those who already passed the RHCE, they should know that Red Hat has recently stopped the RHCSS certification and three of the following associated exams: Red Hat Certificate of Expertise in Security: Network Services (EX333), Red Hat Certificate of Expertise…
After the Debian technical committee’s decision to adopt Systemd as system management daemon several days ago and the choice by the Ubuntu manager, Mark Shuttleworth, to follow the same direction, it’s now clear that every Linux system administrator needs to…
Even though Kerberos understanding doesn’t seem to be critical for passing the RHCE exam, it is still in the objectives list. For this reason and because I’m fundamentally curious, I have written some instructions to configure a Kerberos client and…
For those who are interested in RHEL 7 Beta performance, Phoronix published a benchmark only two days after its release in December. The progresses made at the kernel level (3.10 kernel), at the compiler level (gcc 4.8.2) and at the…
Today I went to the official RedHat forum and learned a firewall tip from Jamie Bainbridge. If you need to change the firewall configuration of a server and don’t want to lock yourself out of this server, you can type…
On January 7, 2014 Red Hat and CentOS have signed an agreement regarding future cooperation. The two distributions were already almost identical except for copyrights, subscription management, and kernel drivers. For people preparing Red Hat certifications, it’s a good news…
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