Dr. Sven Seiler|Theodor-Blank-Allee 22, 44309 Dortmund
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Short Notice

/Short Notice

Short noticed blog posts without much content, but worth to share.
These posts can be related to all other categories, but share in common that the actual content is quite short.

Online Experimentation: Emerging Technologies and IoT

A new book I was involved in with a chapter about "Unified Remote and Virtual Lab Solutions for Engineering Education" was just published. It took now some time to get it edited and finally printed, but it was worth the time to wait for. Here  a part taken from the foreword, written by Mark Schulz from [...]

2019-01-03T16:46:57+02:00

Let’s Encrypt is Trusted

Let´s encryptMit dem 19. Oktober werden die Zertifikate von Let´s Encrypt nun in allen wichtigen Browsern als vertrauenswürdig akzeptiert. Damit ist der Grundstein gelegt um eine weite Verbreitung finden zu können. Einige Jahre lang verwende ich nun schon Zertifikate von Startssl oder aber CAcert. Leider haben sich die Anbieter nie wirklich etablieren können. Mit Let´s Encrypt sehe [...]

2019-01-03T16:46:58+02:00Tags: , , , , |

Chocolatey

I lately stumpled upon "Chocolatey", that is according to its developers, "kind of like apt-get, but for Windows". Chocolatey makes use of the Windows powershell and is very easy to use. It is worth to get more into it.  I used it so far to automate the installation of Vagrant based Windows Virtual machines and to [...]

2019-01-03T16:46:59+02:00Tags: , , , |

Vagrant behind a proxy server

If you are using Vagrant behind a proxy server, you should go for installation of vagrant-proxyconf. But how to install this plug-in when you are currently limited by a proxy? Set your proxy on Windows, open a command prompt and enter: set HTTP_PROXY=http://user:password@proxy.domain.tld:8080 set HTTPS_PROXY=https://user:password@proxy.domain.tld:8081 Set your proxy on Linux, open a command prompt and enter: [...]

2015-10-12T00:53:54+02:00Tags: , , |

Google AdSense Experiment

Starting from today I am experimenting with Google AdSense. I added two different ad units to my pages. One is now placed in the right side bar of the blog pages and another one right after the content of the blog posts, before the comment box. I will now just leave this experiment lasting for [...]

2019-01-03T16:47:00+02:00Tags: , , |

Conquering new frontiers – Amazon EC2

Starting from today, this webpage will be available through Amazon EC2, powered by the “WordPress by Bitnami (HVM)” and is now relying completely on nginx. Bitnami Wordpress Instance I recommend the plug in All-in-One WP Migration for a painless transfer. This plug in save me maybe hours in migration.

2019-01-03T16:47:08+02:00Tags: , , , , |

Solving performance issues with ESXi 6 (Gen8)

If you have installed to a newer version of ESXi on your Gen8 Micro Server and are now suffering from very low performance disk speed, try the following steps to downgrade to a former hpvsa-driver (scsi-hpvsa-5.5.0-88). Just follow these simple steps: Download the driver and unpack the archive named hpvsa-5.5.0-88.zip Stop all VMs that are currently running [...]

2015-09-23T21:20:19+02:00Tags: , , , , |

Information about mail sending PHP scripts

To be enabled to gather information about PHP emailing scripts on your server, you can add two lines to your main php.ini: mail.add_x_header = On mail.log = /var/log/phpmail.log Restart your webserver after changing the php.ini. First parameter is adding a "X-PHP-Originating-Script:" information to the mail header, stating the user name an script name sending the [...]

2015-09-23T21:21:20+02:00Tags: , , , , , , |

Archive.org: 2400 classic games to play for free

The well-known Internet "backup", archive.org curated 2.400 classical games that can be played for free! I am just listing some of my favourites games from the 90s here: The Ultimate DOOM (1995) Out Run (1986) Street Fighter 2 (1991) Block Out Unreal (1991) Bubble Bobble (1988) Hexen - Beyond Heretic (1995) DOOM 2D (1996) Giana [...]

2019-01-03T16:47:10+02:00Tags: , , , |