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Category Archives: Tech

Technische documentatie van Kapitein Vorkbaards digitale avonturen

Create a catch-all address in IBM Domino 9

Written on March 13, 2017 at 16:45, by

Purpose: send all incoming mail to non-existing addresses to a central account. I added corrections, commentary and screenshots to the code I found at The code parts are licensed under the Apache 2.0 license. The non-code part of qtzar’s page is licensed under the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license and […]

Set up a testlab in VirtualBox with a virtual LAN

Written on March 11, 2017 at 07:10, by

Testlab This article describes how to set up a virtual LAN with a virtual router and virtual computers. It is isolated from your physical LAN and meant to test setups with multiple computers in the same LAN. Intended audience This is for everyone who wants to experiment with networked servers isolated from their production network. […]

Simple Twitter unfollower tracker script

Written on March 9, 2017 at 18:08, by

Here’s a script to track Twitter unfollowers. It it based on @sferik‘s excellent command-line Ruby Twitter client ‘t’. Visit its GitHub page for installation instructions; they’re pretty straightforward. The script is quick and dirty but easy to follow: it compares a new followers list to the previous list followers list and e-mails you the difference. […]

Things I learned about Vi(m)

Written on March 9, 2017 at 18:06, by

Here’s my personal documentation on Vi(m) in case I forget how I did it. Hope it helps someone. Running Debian Jessie and I want: – to make Vim the systemwide default editor; – to have syntax highlighting; – a nice colour scheme. For the colour scheme and syntax highlighting we need to install some additional […]

Fun with cron

Written on March 8, 2017 at 18:18, by

Here are some odd things I learned about scheduling jobs with cron. Define your PATH End in newline Log to syslog Set default shell Run every odd minute Mute output Mail to different address Example Define your PATH When running stuff from an interactive shell under your regular account you’re probably using the PATH variable. […]

Cowsay when logging on via SSH

Written on February 8, 2017 at 14:35, by

To give my server a bit of personality I have it render words of wisdom everytime I log on to it through SSH. Also, show its uptime and any tunning tmux sessions. This is for Debian 8, I’m not sure about Red Hat or other distros. First install fortune and cowsay: Place the following commands […]

Randomly follow your Twitter friends’ friends

Written on February 2, 2017 at 14:04, by

Following a rather radical pruning of my Twitter followings (people who I am following) my timeline has got both better and less exciting. So I wanted to follow some new people but not just random accounts. I have a list of ununfollowables: the followings I like best. Those people are probably good judges of the […]

Command-line TweetDeck clone

Written on November 17, 2016 at 12:48, by

Set up a command-line TweetDeck clone, preferably in Linux.

Upgrading Roundcube from the Debian repositories to the current version

Written on November 9, 2016 at 15:05, by

Debian 8 in its repository holds version 1.1.5 of Roundcube. That is fine because that’s a stable version and it’s working without mentionable issues. However I wanted to install the current version (1.2.2) because it has a number of features I like. During installation I followed Roundcube’s own howto. Basically I will just install the […]

Waarom Ziggo geen hostname uitdeelde, of: wat je moet doen om een mailserver te kunnen draaien op een Ziggo-consumentenlijn

Written on October 29, 2016 at 14:07, by

Voor de mensen die alleen op zoek zijn naar de oplossing: hij staat in de een-na-laatste paragraaf. Sommige mensen beklimmen ijsbergen zonder hulpmiddelen, anderen basejumpen. Ik niet – ik maak mailservers. Ieder zijn hobby. Voor een mailserver is niet zo veel nodig: de software is gratis; de hardware heb je meestal al staan (elke oude […]