Blog Archives

What’s new with NetworkManager?

NetworkManager big update From RHEL 7.2 to RHEL 7.3, NetworkManager moved from v1.0.6 to v1.4.0: a lot of things have changed. Color is everywhere! NetworkManager now uses colors to match the status of a device or a connection and sorts

Posted in RHEL7

What’s new with RHEL 7 CGroups?

Since RHEL 6, CGroups have been a work in progress. So, in RHEL 7 features evolved through new Systemd commands like systemd-cgls, systemd-cgtop, and mainly systemctl set-property. Still through Systemd, RHEL 7.0 brought the CPUShares (percentage of CPU), MemoryLimit (memory

Posted in RHEL7

RHEL 6.9 just released.

The RHEL 6.9 distribution has just been released and brings the following main benefits: TLS 1.2 support has been added to all system components, several SSSD improvements have been made in connection with AD forests and PAM services, the cpuid

Posted in RHEL6

Death of Docker?

Back in September 2016, an event went unnoticed, although it was a fundamental change. Google and RedHat declared the game is over: they decided to fork Docker. Why did they decide to do that? Redhat had several reasons: Container conception:

Posted in Others

New interesting articles.

Several technical articles were recently published: Do we really need swap in modern systems?, Avoiding clock drift in VMs, What capabilities an application requires to successfully run in a container, Kernel patching with kexec: updating a CentOS 7 kernel without a

Posted in RHEL7

New interesting videos

If you are new to OpenStack and want to get some basic knowledge about it, Red Hat recently published three interesting videos: Defining the cloud (25min/2017), Defining the Red Hat Enterprise Linux OpenStack Platform (14min/2017), Infrastructure-as-a-Service (IaaS) and a private

Posted in Others

2017 DevConf.cz interesting videos

Last week was organized the free annual community conference for developers, admins, and users of Open Source technologies called DevConf.cz. The conference happened over three days in Czech Republic at Brno. Around 170 workshops were recorded, sorted according to the

Posted in Others

Python dependency hell.

At the beginning there was the Bourne Shell. Then, Perl was created to better deal with character strings and regular expressions. Linux came and the Bourne Shell was replaced with Bash (Bourne Again SHell) with many built-in features like integer

Posted in Others

New interesting articles.

There were several interesting articles recently published: a LWN.net article about the new security oriented Systemd directives, a RedHat article about the Deprecation of Insecure Algorithms and Protocols in RHEL 6.9, a Dan Walsh article about 50 ways to avoid

Posted in Others

Happy new year 2017!

This week was the opportunity for two new tutorials: How to install an Etherpad service How to install a Mediawiki service I wish you a happy new year 2017 and a lot of success in everything you try!

Posted in Others

RHCSA7: Task of the day

Allowed time: 10 minutes.
Set up a default configuration HTTP server with SELinux in Enforcing mode and active firewalld configuration.

RHCE7: Task of the day

Allowed time: 8 minutes.
Set up an iScsi target based on a fileio backstore of 100MB called /opt/shareddata with CHAP authentication (username=usr/password=pwd), xfs filesystem and standard firewall configuration.

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Poll for favorite RHEL 7 book

What is your favorite RHEL 7 book to prepare RHCSA & RHCE exams?

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Poll for most difficult RHCSA 7 topic

What do you think is the most difficult RHCSA 7 topic?

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Poll for most difficult RHCE 7 topic

What do you think is the most difficult RHCE 7 topic?

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