Author Archives: AstroFloyd

Linux-only installation on a 2006 Macbook using rEFInd

While installing Linux on a blank hard-disc drive is trivial on most PCs, it turned out not to be on a 2006 Macbook Core duo. I gave up on the idea that Linux must be able to boot directly from … Continue reading

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Boot Linux from a USB flash drive on a Macbook

In order to install Linux on the replacement of a crashed hard-disc drive in a 2006 Macbook Core duo, I wanted to boot Linux from a USB flash drive in order to then install it. While this is trivial on … Continue reading

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Send a message to a KDE user from the command line

I have been looking for a way to notify KDE users that I’m tinkering with their system. Since I’m usually logged in remotely, knotify doesn’t work, complaining about $DISPLAY not being set. So far, I’ve only been able to find … Continue reading

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Astrophotography with ImageMagick

I am not a very dedicated (or experienced) astrophotographer, but every now and then I feel like taking a photo of the sky. On high ISO and long exposures, you’ll find plenty of noise. Also, if you live as close … Continue reading

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Converting from HTML4 to HTML5 and CSS

I’m one of those people who write HTML in a text editor (either directly, or into a program which later generates the pages). Still, I felt the urge to pretend to be modern and decided to convert my HTML4 pages … Continue reading

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gitcheck: check all your git repositories for changes

One of the cool things about distributed version-control systems (VCSs) or source-control managers (SCMs) like bzr or git is that they don’t have to be distributed. Today, I stick virtually any text file I write into a (local) git repository, … Continue reading

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Using and creating Gentoo Linux repositories using Layman

Gentoo Linux uses ebuild scripts to compile and install software packages. Ebuilds for many packages are available in the default portage repository. However, you may want to add your own ebuilds, for example to add additional packages to your system … Continue reading

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Apache will not start without network connection on Gentoo Linux

After an update of openrc, the apache2 server on my laptop refused to start without a network connection.  Even if the network was up, but hadn’t obtained an ip address, the service wouldn’t start.

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git for coworkers

Would you like a coworker without experience with git to use your git repository?  Or are you that coworker who hasn’t used git before?  Here’s what you need to know.

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Erroneous gfortran warning of unused module variable when variable is only used in namelist

gfortran-4.7.2 -Wall gives a warning about unused module variables when those variables are only used in a namelist: Warning: Unused module variable ‘x’ which has been explicitly imported at (1) The warning goes away when the variable is used elsewhere.

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