Batch Auto-Levels on Images

I had a thousand image files the kids had photographed when creating a stop motion video. An 'auto-levels' on many of the images was required to brighten them up so at the command line I used the following (with ImageMagick already installed of... » More

Customise Yakuake Tabs On Start

Yakuake I've been recommending the slide-down terminal Yakuake to people for some time now and I couldn't live without it myself. Although I use Cinnamon as a desktop I much prefer Yakuake over Guake and can live with the extra RAM usage of the KDE... » More

Arduino Serial Port Menu Greyed Out

On Linux Mint (Ubuntu) I had installed the Arduino IDE from the repository and that had installed version 1.0.5. Despite setting the permissions on the Arduino USB device, the 'Serial Port' option in the IDE menu was greyed out and would not allow for... » More

Resetting Drained Slurm Node

After barking up the wrong tree for a while I discovered via StackExchange how to reset a Slurm Node reporting as drained. Run the scontrol command then update the node as shown in the following example commands (amend the word jacob here to the name... » More

Apache: unable to open logs

In the annals of "Everyday is a learning day". I have an Apache server hosting student websites, and the number of websites grew to over 700 within a day and Apache was complaining with error: It took a little while to narrow down the problem as I... » More

Customise the Unity Launcher from Command Line

I am rolling out some Linux desktops, specifically Ubuntu, and I wanted to customize the icons available in the Unity Launcher. I wanted to remove the LibreOffce Calc and Impress icons and the darned 'Amazon' one, so: Create a new gschema override... » More