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 …

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 …

With this article, I'm starting a blog series I'm really excited about. It's all about VMware's vRealize Orchestrator (vRO) - a very might tool than can simplify a VMware administrator's workaday life heavily. 🙂

What is vRealize Orchestrator? …

By default, Enterprise Linux 7 is shipped with Apache 2.4.6 and PHP 5.4. For some current web applications this is way too old as development of PHP 5.4 stalled in fall 2015.

During the product life cycle,  Red Hat offers 10 to 13 years (Extended Support) maintenance for all packages being part of the distribution - …

When running Oracle databases under Linux, some additional kernel parameters need to be set. Oracle lists these parameters in the appopriate documentation - e.g. for the most recent version 12c: [click me!]

Especially for Enterprise Linux 7 there is a dedicated profile for the tuned service (RPM package …

Yesterday Red Hat released the 8th update of Red Hat Enterprise Linux 6. The changes have been documented in the release and technical notes:

• Release Notes: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.8_Release_Notes/index.html
• Technical Notes: …

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/ …

I was puzzled when I saw that the ESXi hosts of my new lab are generating critical CPU fan errors. Strange, I'm sure I mounted the fan correctly - otherwise the system would have been shutdown automatically to prevent serious damage. 🙂

I had a look at the IPMI web interface and saw that a fan is detected - but why is …