Screw you Microsoft


On a scale from 0 to North Korea how much did Microsoft just fuck it up:

Got “We were unable to establish the connection because it is configured for user but you attempted to connect using user To connect as a different user perform a switch user operation. To connect with the configured identity just attempt the last operation again.” while trying to re-active my VS license trough ADFS.

Running a limited number of scripts in parallel from Bash


Imagine you have a text file with a single parameter for another script on each line, but you want to speed things up. Instead of writing an overly complicated wrapper script, as I did a few times in the past, you could just use xargs. It comes equipped with everything needed for this task. The following example assumes, that for each parameter in parameters.txt the command should be executed, with no more than 20 processes at the same time:

cat parameters.txt | xargs -n 1 -P 20

I guess it’s not hard to figure out that -P is the magic switch to allow multiple instances to be executed at the same time.


Wildlachs, Basmati-Reis und Tomaten Senf-Sosse


Mit Hunger von der Arbeit gekommen und ganz schnell in freestyle Manier etwas zum Essen zubereitet. Die Soße war so überraschend lecker, dass ich das mal besser für die Nachwelt erhalte 😉


  • Wildlachsfilets
  • Uncle Ben’s Basmati-Reis
  • 1 Handvoll Kirchtomaten
  • Tomatenmark
  • 1/2 halbe Zwiebel
  • 1 Esslöffel süßer Senf
  • 1 Teelöffel extra-scharfer Senf
  • 1-2 Teelöffel Honig
  • 1/2 Limette
  • Olivenöl
  • Salz & Pfeffer


Wildlachs in eine große Pfanne geben und anbraten. Zwiebeln und Kirschtomaten dazugeben. Kirschtomaten leicht zerdrücken und Tomatenmark nach Belieben hinzufügen. Nach ein paar Minuten Olivenöl, Honig, sowie den süßen und extra-scharfen Senf hinzugeben und weiter köcheln lassen. Den Basmati-Reis in der Mikrowelle zubereiten. Währenddessen den Wildlachs und die Soße mit den Saft einer halben Limette beträufeln. Die Soße anschließend mit Salz und Pfeffer abschmecken. Alles auf einem Teller anrichten. Fertig!


Why isn’t the full certificate chain provided by my web server?


Good question, simple answer though: Probably you’re still on Ubuntu 14.04 (Trusty) and thus your Apache version is too old (2.4.7) and does not provide the full certificate chain from the file specified as SSLCertificateFile. The nasty thing: It does not throw a warning nor an error; not on the console nor in the error.log.

Solution: Use the SSLCertificateChainFile option instead to point to the intermediate certificates of your CA.

But watch out when you update your server: SSLCertificateChainFile became obsolete with version 2.4.8, when SSLCertificateFile was extended to also load intermediate CA certificates from the server certificate file.

Citrix Receiver on Ubuntu 15.10


For anyone who has to access Citrix XenDesktop via web browser from an Ubuntu 15.10 machine:

  1. Download “Receiver for Linux Web Client” from
  2. Install the downloaded DEB package
  3. If the remote site is using its own certificate authority, copy the CA certificate file of the remote end to
  4. Rehash the Receiver’s certificate store by executing the following command in the console:
    sudo c_rehash /opt/Citrix/ICAClient/keystore/cacerts/