In order to make mobile connection easier the website theme has been changed. It should now be handier to access pages during a trip. In addition, there are two new quiz: one for the RHCSA 7 exam and one for…
Every day I can hear someone saying: the ifconfig command has been removed from the RHEL 7/CentOS 7 distribution and nobody told me anything! Invariably, it’s about a RHEL/CentOS minimal installation. To alleviate this unpleasant situation, there is now a…
When dealing with SMTP for the RHCE or LFCE exams, there are some tips that can be very useful to know about Postfix. First, you’ve got a very interesting website at http://www.postfix.org/postfix-manuals.html. Then, during the exam, you can get some…
One week after the CentOS 7 rolling builds announcement, one day after the Fedora 21 release, it’s now the RHEL 7.1 Beta that is unveiled! This minor release brings many new improvements. Lots of them are summed up in the…
Since RHEL 6, a transaction history has been added to the yum command. This feature allows you to precisely know which packages have been installed on a server and in which order. In addition, you can undo or redo any…
If you need to configure a server for a specific task (for SAP, with reduced network latency, for maximum throughput, as a desktop, as a virtual host, etc), a dedicated tool already existed in RHEL 6: tuned-adm. This tool still…
In one of his latest videos Sander van Vugt shows us that some SELinux information is not available without some tricky operations. Actually, after a standard RHEL 7 / CentOS 7 installation, only basic SELinux man pages are installed. All…
Today, Scientific Linux 7.0 is officially released. In the Scientific Linux 7.0 release notes, two points need attention: The default Scientific Linux 7 installation provides automatic updates via the yum-cron package: because this distribution is often installed by graduate students, it has been decided…
Today, Dell just released its KVM Virtualization made easy for RHEL 7. To anybody interested in building a KVM lab, this is a must-read. In this white paper, Jose De la Rosa from Dell explains all the steps involved in…
The I/O scheduler policy has changed with Red Hat Enterprise Linux 7. The default I/O Scheduler is now CFQ for SATA drives and Deadline for everything else. Indeed, for faster storage than SATA drives, Deadline outperforms CFQ, giving a performance increase without…
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