Roland's homepage

My random knot in the Web

Welcome

This is my home in the virtual world, where I write about things that I want to share. The freely available software that I've written as well as some of the photographs I've taken over the years can also be found here. Please use the navigation links on the right if you are looking for something.

Recent articles

  1. PDF tricks

    This article contains several useful tricks for manipulating PDF files.

    The focus of this article is on Open Source and Free software, that are available for UNIX-like operating systems. These tools are made for use on the command-line of a shell.

  2. Headphone repair

    For listening to music and watching movies on a PC, I prefer headphones. Years ago, I bought a Sennheiser HD 280 PRO, which I like very much. It sounds good and really attenuates external noise well (32 dB).

    Sadly though, the earpieces were disintegrating after years of service. As soon ...

  3. Making Ex Libris booklabels

    It has been my custom to mark books that I buy with my name and date of purchase. Initially I wrote these, but that became tedious. Since I’m not much of a graphic artist, I decided on creating a simple booklabel in LaTeX, as shown below.

    Old Ex Libris of R.F. Smith

    In 2014 I ...

  4. Repairing a color laserjet 2550

    Some time ago, my trusty old color laserjet 2550L more or less stopped printing, or at least I thought so. It turned out that the printer only printed in yellow. Which is not particularly useful.

    At the time I bought this printer not because I print very much, but because ...

  5. Switching to the vim editor

    date: 2016-12-11
    original date: 2013-08-17
    category: howto
    tags: vim editor

    After having been an Emacs user for a long time, I was starting to grow disenchanted with it around version 24. My main problem is that it was starting to get really slow. Not just in starting up, but also in daily use, specially it you kept an instance open ...

  6. Daal

    This is a recipe that I got from my big sister. She got it from her friend Charlotte. Thanks to both. :-)

    • one onion, finely chopped
    • two big cloves of garlic, finely chopped
    • one green chili, seeds removed, finely chopped (or some dried chili, like piri piri)
    • one carrot peeled and ...
  7. Adding text or graphics to a PDF file

    Using Acrobat Reader’s ability to add text et cetera has proven unreliable for me. On multiple occasions I have lost all the text added to a PDF file. When your filling in 20-plus pages worth of permit forms this is a huge waste of time and extremely annoying.

    So I set out to find another way using the free and open-source tools I have available.


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