When a service doesn’t run as you would like, when you want to change its default configuration, Systemd offers you several options. Firstly, you can copy the standard unit file from the /usr/lib/systemd/system directory into the /etc/systemd/system directory and then…
To a non expert, Firewalld can sometimes appear a little bit strange and confusing. Let’s take an example: you just set up an Apache webserver and want to configure a https virtual host. Because it’s a test, you want to…
When working with services in RHEL 7, you can check if a service is currently running with the is-active option or enabled at boot time with the is-enabled option. But it is more difficult to know if the unit file…
ISCSI configuration is a very tricky topic of the RHCE 7 exam. If a RHCE candidate takes the exam without previous iScsi experience, he will fail! Man pages are not enough to understand the intricacy of this subject and there…
Today, Centos 7 (1503) aka CentOS 7.1 has just been released. The distribution can now be downloaded from the CentOS website. The Release Notes explain the major changes: As of March 2015 ABRT (>= 2.1.11-19.el7.centos.0.1) can report bugs directly to…
If you have to migrate a HTTPD server from RHEL 6/CentOS 6 to RHEL 7/CentOS 7, you should be careful. The default HTTPD SELinux policy has changed and very limited information has been provided about it: many free tutorials available…
Although keeping a system tidy is not an exam objective, it’s a nice skill to have. Three tutorials can help you to progress in this domain: How to keep your system clean: this tutorial teaches you how to better manage…
Today, Red Hat announces the official release of RHEL 7.1. To know more about this new version you can read a summary of the RHEL 7.1 changes or the RHEL 7.1 Release Notes. In addition, Red Hat is also releasing…
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…
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