Blog Archives

CentOS 7 News.

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

Posted in RHEL7

RHEL 7 Service masking.

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

Posted in RHEL7

RHEL 7 Systemd unit file customization.

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

Posted in RHEL7

RHEL 7 Firewalld tips.

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

Posted in RHEL7

RHEL 7 systemctl status command.

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

Posted in RHEL7

RHEL 7 ISCSI configuration.

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

Posted in RHEL7

CentOS 7.1 released.

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

Posted in RHEL7

RHEL 7 HTTPD SELinux policy hardening.

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

Posted in RHEL7

Linux package management tips.

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

Posted in RHEL7

RHEL 7.1 officially released.

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

Posted in RHEL7

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