• vSphere HTML5 Web Client Fling

    calendar Mar 30, 2016 · 4 min read  ·
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    A couple of days ago, VMware developers announced a new fling called vSphere HTML5 Web Client. Basically, this is a virtual appliance based on SUSE Linux Enterprise Server 12 serving a completely rewritten Web Client. In comparison with the well known Web Client, this client only uses HTML5 and JavaScript - beelzebub …
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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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  • Short tip: Reset VSAN cluster

    calendar Mar 20, 2016 · 1 min read · kurztipp vsan  ·
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    Especially when playing around with multiple vCenter and VSAN versions in a lab, it might be necessary to rebuild a VSAN cluster. In this scenario, it is sometimes also necessary to also reset the SSD and HDD drives used by VSAN. In my lab I'm often resetting the whole VSAN cluster to have a clear starting point - …
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  • Restore the MBR of a Linux installation

    calendar Mar 17, 2016 · 3 min read  ·
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    As preparation for a restore test, I removed the master boot record (MBR) of a Linux system recently:

    1# dd if=/dev/zero of=/dev/sda bs=512 count=1

    This command fills the first 512 bytes (containing the partition table and bootloader) of the first hard drive (/dev/sda) with zeroes (/dev/zero).

    The problem is when you …


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  • Configure LACP under CentOS along with Cisco

    calendar Mar 16, 2016 · 4 min read · cisco  ·
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    <img
  loading="lazy"
  decoding="async"
  alt="LACP setup"
  
    class="image_figure image_internal image_unprocessed"
    src="https://cstan.io/images/2016/03/LAG_Setup.jpg"
  
  
/>

</picture>

    If a host has …


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  • Forgot vCenter Server Appliance root and SSO administrator password

    calendar Feb 18, 2016 · 2 min read · vcsa  ·
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    Loosing the SSO administrator password of vCenter Server Appliance (vCSA) is really bad. Anyhow, this password can be reset, as far as you still have access to the appliance console - this requires the root password. If you also forgot this one, this is really, really, really bad - but also this happens sometimes in …
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  • Short tip: Reset Linux password unattended

    calendar Feb 16, 2016 · 1 min read · kurztipp  ·
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    Sometimes it happens that you lock out yourself from your Linux system. In the worst case, additional security concepts or conditions might hamper access to the system, for example:

    • No root access
    • System cannot be rebooted to reset the password in a chroot session
    • No colleague with system access available

    Recently I …


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  • Analyze and clean-up installed RPM packages with package-cleanup

    calendar Feb 12, 2016 · 2 min read  ·
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    During the installation of kernel updates I stumbled upon a cramped /boot partition recently. Solving this issue is quite easy - e.g. it is possible to manually dig through the RPM database, exclude the running kernel and remove all other packages. Anyhow, this is neither comfortable nor elegant:

    1# yum remove `rpm …

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  • 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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