While registering a client system with a FreeIPA server I recently stumbled upon the following error message: 1# ipa-client-install 2... 3User authorized to enroll computers: admin 4... 5Kerberos authentication failed 6kinit: Cannot read password while getting initial credentials After wasting quite a lot of time with …

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IOmeter is a collection of tools for running detailed IO benchmarks. It is often used as the tool is able to reproduce the characteristics of current applications and services. IOmeter consists of a management software that manages and evaluates the particular tests and Dynamo - an executable that run these tests in …

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Especially during sight-seeing it is often desirable to capture a big scene. In this case, it is great to have a wideangle or even ultra-wide angle (UWA) lens in your pocket. After I was able to take pictures with a Canon EF 8-15mm f/4L Fisheye USM lens, I wanted to have a comparable lens (with an extreme image angle). …

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Recently one of my vCenter Server Appliance (vCSA) 5.5 installations was unable to proceed logins anymore. After having a look at the storage consumption I saw that two partitions were filled up: 1# df -h /storage/{core,db} 2Filesystem Size Used Avail Use% Mounted on 3/dev/sdb1 20G 20G 0 100% /storage/core 4/dev/sdb3 …

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One of the rumors regarding VMware vSphere 6 was that a kind of slim vSphere Web Client will be part of ESXi to replace the outdated vSphere Client (legacy client). ESX offered a web-based administration utility, that has been completely removed in ESXi. Since then, the web interface of ESXi is only capable of browsing …

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If you are using drivers and libraries that need access to Oracle databases (e.g. perl-DBD-Oracle), you will need the Oracle Instantclient. Oracle offers this software for free after registration. Unfortunately creating correct provides tags was missed when creating the RPM packages. Even though Instantclient is …

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GitLab is a very popular alternative to GitHub that is available as free Community Edition for interested hobbyists and smaller companies. For installing the software, there is a script for downloading and installing the particular software packages. If you have a look at the source code of this script, you will see …

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Some of you might have recognized that it has been surprisingly quiet on my blog in the last couple of weeks. The reason for this was not that I have not been keen for blogging - rather I was working on something bigger that I'd love to present you today. 🙂 It is nothing less than a book about VMware vSphere named …

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After a couple of months or years plenty of storage is wasted on Windows systems and sometime it is not possible anymore to free space by using the well-known procedures. Recently I had this issue on a 5 year old system - the following steps did not help anymore: Executuing the Disk Cleanup utility Manual cleaning …

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Recently I stumbled upon the following error message while creating a DRBD volume on CentOS 7: 1# drbdadm create-md r0 2initializing activity log 3NOT initializing bitmap 4Writing meta data... 5lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory 6New drbd meta data block successfully …

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