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  • Distribute Python modules using RPM

    calendar Sep 30, 2016 · 2 min read  ·
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    The Python Package Index (PyPI) website offers plenty of Python module source codes. To install these modules, it is needed to download and extract the archive and execute an installation script afterwards. Using the pip (pip installs packages) package manager, this process can be automated - e.g. for the nagiosplugin …
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  • 5 tools you should not be able to run as root

    calendar Aug 30, 2016 · 3 min read · freeipa red-hat-identity-management  ·
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    If you plan to restrict utilizing the root user under Linux, it is most likely that you will create sudo rules to allow certain users to execute administrative utilities. There are plenty of tools you really should not be able to run as privileged users - some examples:

    screen, tmux

    The famous terminal multiplexers GNU …


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  • Install Icinga2, Icinga Web 2 and Icinga Director under EL7

    calendar Jul 6, 2016 · 6 min read · icinga-director icinga2  ·
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    Icinga2 is a very powerful monitoring system that can be used optionally with the new user interface Icinga Web 2. In comparison with Icinga 1.x, those tools have been developed completely from scratch - they have nothing in common with the legacy software stack.

    This year, a configuration utility named Icinga Director …


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  • Short tip: sudo and vi(m)

    calendar Jun 28, 2016 · 1 min read · kurztipp  ·
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    System administrators know requirements like this - a dedicated server needs to be deployed for a new application. In order to enable owners to maintain their application they need permissions to modify relevant configuration files. In this scenario, sudo rules are often configured in a way to enable file modifications …
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  • Spoiled for choice: new HDDs for my NAS

    calendar Jun 26, 2016 · 7 min read · nas  ·
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    2016 seems to be the year of big hardware renewals for me - after completely overhauling my virtual infrastructure, I also needed new hard drives for my NAS after nearly 4 years.

    NAS, DAS, what?

    For many years, I have been using D.I.Y. NAS servers for collecting my data and media library on a single host. After I was …


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  • Monitor systemd units with Nagios/Icinga

    calendar Jun 6, 2016 · 1 min read · icinga nagios  ·
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    Recently I stumbled upon an interesting blog post about monitoring systemd units with Nagios or Icinga.

    But in my opinion the post's screenshot is misleading. I looks like the linked Python scripts automatically discovers and configures systemd units within Nagios/Icinga - which is not the case. The script named …


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  • Short tip: OMD and Python error 'TypeError: 'frozenset' object is not callable'

    calendar May 27, 2016 · 1 min read · omd kurztipp  ·
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    When configuring and testing a Python Icinga plugin within an OMD site, I stumbled upon the following error recently:

    1TypeError: 'frozenset' object is not callable
    

    After some tests on other systems, I found out, that the Python library hashlib shipped with OMD seems to be faulty. Copying the system-wide …


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  • Short tip: Changed Owncloud CardDAV/CalDAV URLs

    calendar Apr 26, 2016 · 1 min read · kurztipp  ·
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    Recently I had issues with configuring CardDAV-Sync and CalDAV-Sync along with Owncloud after a fresh Android installation. Specifying the well-known URLs just produced several error messages inside the app:

    https://my-server.tld/owncloud/remote.php/caldav/principals/USER/ …


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  • Compile Python applications automatically for Windows using GitLab CI

    calendar Apr 20, 2016 · 5 min read · gitlab powershell  ·
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    Some time ago I wrote about GitLab Continuous Integration and explained how code changes can be catched up to create or update software packages on remote systems. In order to communicate with the development systems, GitLab utilizes agents that are availble for plenty of platforms - including Microsoft Windows, we …
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  • IPFire hardware upgrade

    calendar Mar 20, 2016 · 5 min read · ipfire  ·
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    2016 seems to be the year of hardware upgrades for me. After replacing my ESXi host with a VSAN cluster recently, I also had to replace the D.I.Y. router after upgrading my internet connection. At maximum data throughput, CPU load and temperatur are increasing so heavily that other network traffic is slowing down …
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Christian Stankowic

Virtualization, Linux and IaC
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