Running Unity games via Steam in Linux
How to launch a Unity game downloaded via Steam on Linux.
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Configure CentOS/RedHat VMs with Kickstart files on Virtualbox
Kickstart is a type of file that’s used to automatically install RedHat or CentOS Linux on a physical or virtual server. If you are managing more than a few servers, it’s a good idea to configure the servers via kickstart files instead of logging in and configuring each one manually. However, some unfortunate choices were …
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General error: 2006 MySQL server has gone away
“MySQL Server has gone away” is a cryptic error that can be hard to troubleshoot (look at all the various responses on Stack Overflow!) Many problems can cause this error; I would like to document one specific case. In this example, the client is a PHP app using the Phalcon framework: [Mon, 09 Apr 18 …
Viewing logs for a cluster of instances on Google Stackdriver Logging
StackDriver Logging is a great feature of Google Compute Engine (GCE). You pretty much need a centralized logging solution if you are taking maximum advantage of the features offered by GCE. For example, most production applications will run on a cluster of web servers. If you set up the cluster as a managed instance group …
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Getting DSSP to run with GROMACS 4.5.5 on Red Hat Linux
UPDATE A new version of GROMACS (4.6 series) has been released since this post was written. Please try installing the latest version of GROMACS before attempting the steps in this post. Fixing GROMACS There is a bug in the do_dssp command in GROMACS 4.5.5 that prevents the analysis of secondary structure using DSSP . Attempting …
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Mini Maker Faire Orlando Report: Electronics
In my previous post about the Mini Maker Faire Orlando, I described some of the cool hardware that was on display. In this post, I’m going to describe some of the electronics available from local vendors. Electrimod Local vendor Electrimod (Clermont, FL) was on hand to showcase their pluggable modules for PIC microcontroller development. Basically, …
TeXLive and Asymptote on CentOS 5
Tex Live For reasons unknown, a TeX Live package is not available for Red Hat Enterprise Linux/Centos 5 from the major repositories (EPEL or DAG). I consider this to be a glaring omission, since TeXLive is a great improvement upon teTeX. Since I don’t have time right now to package it myself, I installed TeX …
How to install Octave video tools on CentOS 5
This post describes how to get GNU Octave up and running on a CentOS 5 Linux system for use in reading, processing, and writing video files. You will need to use the EPEL and DAG/rpmforge repositories, but I won’t explain how to do that here. NOTE: I had to go through some trial and error …
Moving example code to GitHub
As this site has grown, the example code has gradually become unmanageable. I’ve posted snippets and fragments here and there over the years, and the original code is scattered in various locations across several computers. Further, as people have pointed out bugs or ways to improve the examples, I’ve had a hard time making changes. …
Reading an array from a text file with Fortran 90/95
If you’re used to coding in more modern languages, Fortran I/O can seem a little bizarre. Strings in Fortran are much more difficult to work with, since they are fixed-length rather than null-terminated. The following example illustrates a simple way to read an array of numbers from a text file when the array length is …
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