Category Archives: Computing

Keeping recordings and DVB channels when moving MythTV

Posted on September 28, 2012 by james

Thanks to a server dying I’ve been moving my MythTV installation to a new system. I wanted to install from scratch to clean out a load of old settings and other data that have been hanging around for years (I’ve … Continue reading →

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Clearing BIOS RAID metadata for CentOS6 install

Posted on September 28, 2012 by james

Today I was trying to install CentOS6 on a server put together from bits and pieces I had lying about. The CentOS installer would not include either of the disks I’d used because it claimed they had BIOS RAID metadata … Continue reading →

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Nginx Rate-limiting with a Whitelist

Posted on August 2, 2012 by james

I recently needed to deploy a rate-limiting solution for a site where certain IP addresses would be white-listed and not subjected to the rate limits. Google found me an example in a blog that turned out not to work, though … Continue reading →

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Installing Grub on MD Disk Partitions

Posted on May 5, 2012 by james

I rarely have to do this, so I can never recall exactly how on those odd occasions when it does come up. Usually it’s when one of the boot disks in a server has been replaced. Anyhow, as much to … Continue reading →

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Chrooted SFTP for Linux

Posted on April 20, 2012 by james

I had a few problems recently when I was trying to set up chrooted SFTP for a single user on a CentOS6 server. Whichever set of instructions I followed, I couldn’t get it to work for me. Eventually, combining information … Continue reading →

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qastrocam-g2 — Astro Image Capture for Linux

Posted on April 19, 2012 by james

Today, pretty much by accident, I stumbled over qastrocam-g2. It’s an astro-imaging capture application for Linux. Thus far I’ve been muddling through with SharpCap, which is absolutely no criticism of that application at all. I just really can’t get on … Continue reading →

Posted in Astroimaging, Astronomy, Computing, Linux | 8 Comments

Xbox Live Camera on Linux (Part 5)

Posted on April 18, 2012 by james

A brief gap in the clouds this evening gave me a window of about five minutes to test out a couple of Xbox cameras under a night-time sky. I took 30 frames of five seconds each, ten seconds apart. Here … Continue reading →

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Xbox Live Camera on Linux (Part 4)

Posted on April 18, 2012 by james

The promised instructions on rebuilding the kernel UVC kernel module. Here’s what I did on my Ubuntu 11.10 Aspire 1. If you substitute in your own kernel version number then you should be ok if you’re running other releases. I … Continue reading →

Posted in Astroimaging, Astronomy, Computing, Linux | 1 Comment

Xbox Live Camera on Linux (Part 3)

Posted on April 18, 2012 by james

It seems I made an error in my initial attempt to get the exposure settings working for this camera in the uvcvideo driver. The camera appears to accept a far greater range of settings for exposure than I initially thought. … Continue reading →

Posted in Astroimaging, Astronomy, Computing, Linux | Leave a comment

Xbox Live Camera on Linux (Part 2)

Posted on April 16, 2012 by james

Last night I discovered that I wasn’t able to change the gain setting on the camera using the V4L2 API. No matter what setting I used all my captures turned out the same, using what I presume to be the … Continue reading →

Posted in Astro Equipment, Astronomy, Linux, Projects | Leave a comment