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My random knot in the Web

Articles about howto

  1. Checking links with linklint

    This website contains lots of external links. A fact of life is that hyperlinks are subject to change, so they need checking every now and then.

    In this how-to article I’ll cover how I did that for this website.

  2. Backups

    People usually have to learn the hard way that backups are important. For people not familiar with computers it takes time to appreciate the nature of digital data. Digital data is easy and cheap to create and copy, but equally easy to destroy and lose! It is very easy to accidentally delete files.

  3. Converting PostScript and PDF images to SVG format

    As a long-time UNIX user I’m used to programs generating PostScript output, and I’m fluent enough in that language to produce graphics in it myself. Unfortunately PostScript is hard to display e.g. on the Web. Luckily another vector format, svg has arisen that is supported by modern ...

  4. Managing configuration files

    Configuration files for UNIX-like systems and the programs that run on them are usually plain text files. They tend to come in two flavors;

    System files
    These files live in /etc or /var or /usr/local/etc and control the running of the system and additional software, for all ...
  5. Making a subset of a git repository

    Since I am in the process of making most of my programs available on github, I have been re-shuffling the some git repositories. Especially my collection of scripts (small programs for different purposes). Because some of those scripts are private, I don’t want to publish that repository as a whole.

  6. Keyword expansion with git

    One of the things I liked about the old rcs revision control system was that it supported keyword expansion in files. Unlike systems like rcs, cvs and subversion, the git revision control system cannot provide keyword expansion. The cause for this is that you can’t modify a file with ...


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