Yesterday, Red Hat announced the official release of RHEL 6.6. This minor version brings several improvements: The scap-security-guide package has been added providing a convenient and reliable way to verify system compliance on a regular basis, The KeepAlived and HAProxy…
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…
One year ago I decided to start this website. One of the reasons explaining this move was to see how it was difficult to complete some tasks like LDAP client configuration without almost any tutorial to set up the server…
The Red Hat certification team recently made some adjustments to the RHCSA & RHCE exams objectives for RHEL 7. Concerning the RHCSA exam, VNC and LUKS related tasks have been removed, when firewall settings can now be set up through…
Two days ago, the Linux Foundation announced a new certification program. It consists in two exams: LFCS (Linux Foundation Certified System administrator), LFCE (Linux Foundation Certified Engineer). Both exams are performance-based exam in English lasting 2 hours focusing on system…
Some applications writing files in the /tmp directory can see huge improvements when memory is used instead of disk. You will find all the details in the tutorial about configuring /tmp on tmpfs.
If you don’t know the kpartx command, you miss something! If you regularly play with virtual machines under KVM, you know that sometimes things go wrong. A change in the /etc/fstab file or in the ssh configuration and you are…
With Systemd, the Init scripts are not there any more. Consequently, the execution of tasks at boot time had to change. Hopefully, a nice solution has been found: it uses the good old rc.local file. Now, to execute tasks at…
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