• vSphere High Performance Essentials

    calendar Feb 1, 2016 · 3 min read · esxi vcsa  ·
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    New year, new book - some of you might have noticed it: in the last couple of weeks, there were not much updates on my blog. The reason is that I have been working on a second book project. This time I had the pleasure to work as main author on a book about VMware vSphere. Last year, I have already been working as …
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  • IPFire and the AX206 display

    calendar Jan 24, 2016 · 4 min read · ipfire  ·
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    Thanks to the lcd4linux project, Linux also offers the possibility to control LC display - e.g. to display status information. Some years ago, a very cheap digital picture frame was sold on mail-order houses like Pearl. Using an alternative firmware, this device is also capable of being controlled by lcd4linux. Since …
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  • Migrating from IPCop to IPFire

    calendar Jan 19, 2016 · 5 min read · ipcop ipfire  ·
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    Since 2008 I have been using the free Linux distribution IPCop to implement a customized firewall/a router. Of course, DSL providers also equip their customers with routers, but back then I was missing a couple of functions. To name some of them:

    • IPSec / OpenVPN
    • NTP time server
    • DMZ segmentation
    • WLAN access point with …

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  • GitLab Continuous Integration

    calendar Dec 11, 2015 · 7 min read · gitlab  ·
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    With the new major version 8, GitLab was extended to include a continuous integration (CI) component that was developed as dedicated project until now. While it was necessary to utilize external solutions, such as Jenkins, previously, it it now possible to automatically compile and test managed projects easily.

    But, …


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  • Microsoft Active Directory Domain Services authentification under VMware vCenter Server Appliance 6

    calendar Nov 12, 2015 · 2 min read · vcsa  ·
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    For integration in Microsoft environments, VMware offers several Microsoft Active Directory Domain Services (AD DS) connectors in vCenter Server:

    • native integration: vCenter Server is managed as computer object in Active Directory
    • LDAP broker for authentification in Single-Sign-On (SSO)

    When installing the last …


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  • Short tip: Configure HP Smart Array Controller using EFI Shell

    calendar Nov 10, 2015 · 1 min read · hp hp-ux itanium kurztipp  ·
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    New HP Smart Array controllers built into a  HP Integrity machine are basically unconfigured. When running the EFI Shell, you will probably see the following message:

    1HP Smart Array P800 Controller     (version 7.22)  0 Logical Drives
21785-Drive Array Not Configured
3     Run Smart Array Configuration Utility
4...
5 …

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  • VMworld Europe 2015

    calendar Oct 20, 2015 · 12 min read · conference  ·
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    Last week the european VMworld event was taking place in Gran Via, Barcelona. Like every year VMware hosts their own event, that is focussed on VMware and partner developments. This year's event was themed "Ready for ANY", giving VMwares focus on more flexible Cloud and Mobility a voice.

    On four days …


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  • Spacewalk 2.4 released

    calendar Oct 10, 2015 · 3 min read · red-hat-satellite spacewalk suse-manager  ·
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    This week Spacewalk was released in version 2.4 after 6 months of development. In summary, about 60 bugs were fixed and some new features were implemented.

    The web-interface is now available to other projects as part of the Patternfly framework. The project driven mainly by Red Hat aims at combining beatiful designs …


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  • Short tip: kinit: Cannot read password while getting initial credentials

    calendar Oct 1, 2015 · 1 min read · freeipa red-hat-identity-management kurztipp  ·
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    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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  • Use IOmeter under Linux

    calendar Oct 1, 2015 · 3 min read  ·
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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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