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    Senior Network Engineer

    Marcin Ślęczek

    Network Engineer and System Administrator at networkers.pl Sp. z o.o. Since 1999, he deals with the administration of networks and GNU/Linux servers, and the integration of various solutions for IT systems and data centers. Since 2006, he has been working with Cisco Systems solutions, and since 2017 with Red Hat solutions. In 2009, he set up the company networkers.pl, which deals in the sale and implementation of solutions, hardware and software for IT systems and data centers.

Posts By Marcin Ślęczek (8)

  • Ansible, part II – modules and ad-hoc commands 0

    Sending ad-hoc commands is very simple and at the same time opens up many very useful possibilities. Thanks to them, we can conveniently issue single command on one or many nodes. Issuing such commands allows among others: querying for various statuses, compliance verification, configuration backup, node or service restart, file, package and user accounts management,

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  • Ansible, part I – basics and inventory 2

    Making changes manually is tedious, and problematic in terms of documenting. Ansible addresses both of these problems. It’s great for what we don’t like. It is doing the same thing on many elements. In addition, the resulting YAML file becomes a form of documentation. It certainly will not replace the typical documentation with diagrams, tables

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  • Automation in practice 0

    When we hear about automation, we often see the image of robots and machines replacing people and taking their jobs. Let’s not go to extremes and let’s not be deceived by these myths. Let’s look at it from a different perspective. Automation in practice – let’s warm-up! To perform low-level, repetitive and monotonous activities, you

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  • RHEL 8 for data centers and cloud environments. Wh... 0

    In the next part of this article, we will go mostly through the better handling of software packages and more functional and safer support for containers and images. These elements are increasingly important in data centers and cloud environments. Before we get to it, let’s start with the most interesting feature for bare metal servers

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  • Web-based management interface, sessions recording... 0

    In the third part of this article, we will go through further improvements of the RHEL8 system, like: more efficient and secure graphic environment (GNOME and Wayland), recording of administrative sessions (terminal session recording), web-based management interface (Cockpit and its integration with Red Hat Satellite), simplified support for advanced disk system functions, better use of

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  • Safer DNS, e-mail and other improvements of RHEL 8 0

    In the first part of this article, we wrote about high-performance packet processing at the network adapter level using XDP and eBPF, and about the possibility of achieving greater throughput with lower latency, thanks to the BBR algorithm for TCP. These two new possibilities of the RHEL8 system bring benefits to everyone, regardless of the

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  • Why to choose Red Hat Enterprise Linux 8? 0

    No one likes renovations. Changes in IT systems and data centers will continue to be more and more noticeable and expensive. The reason for this is the increasing complexity of these environments, as well as the growing amount of data, services and applications. This year, on May 7 2019, the 8th version of Red Hat

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  • Five applications of Red Hat Satellite 0

    Complexity and the amount of applications and services in today’s IT environments are still growing. Manual management increases not only the security and not compliance risks, but also the time needed to detect and remove it. The same applies to the continuity of IT system services and errors – as much as 17% of data

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