With the upcoming RHEL 7.2 version, Systemd should be upgraded, going from version 208 to 219. This Systemd upgrade decision was taken according to Lukáš Nykrýn from Red Hat because “it is really difficult and risky to backport patches from newer version…
Here are some of the main 2015 Red Hat Summit announcements: the upcoming RHEL 7.2 release will bring SCAP profiles into the installation process, cryptography enhancements, kernel patching, performance gains (network and system), a new predictable cycle for software updates,…
The other day I was looking at some Systemd service properties with the systemctl show command. One of them, CPUShares, got my interest. Caution: The following tutorial shouldn’t be run on a production server! The CPU will be used at…
There are some activities on the CentOS 7 side: after a CentOS 7 (1503) alpha candidate for AArch64, there is now a CentOS 7 (1503) beta candidate for AArch64 platforms, a CentOS 7 (1503) beta candidate for i686 platforms has…
Many people don’t figure out why a Systemd service can be masked. They understand the need to enable it at boot and start it but why masking it? Back to basics, a Systemd service can be: manually started with the…
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…
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