Category: technology
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Linux – Fixing the Epson (V33 Perfection) Scanner Issue in Kubuntu 18.04
[NOTE: As of Ubuntu/Kubuntu 20.04, the drivers from Epson work fine without this workaround. Download the driver, then follow the directions to install it.] As of Kubuntu 17.10, my Epson V33 Perfection scanner stopped working with Linux. I bought this scanner specifically because it did work with Linux. That it stopped working was a serious…
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Linux: How to Install Zotero Standalone (in KDE or Kubuntu)
I’ve used Zotero to manage my collection of books, articles, and other citations since Zotero was released. The software has become much more robust over time. As of the latest major milestone release (5.0), Zotero has moved to standalone software exclusively (they no longer piggyback on Firefox). With Mac and Windows, you can download executable…
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Virtual Private Hosting – How to Remove a Domain with Certbot SSL Certificate (on Ubuntu 16.04 with apache)
It used to be pretty easy to remove a domain from my Virtual Private Server – dissable the site in apache, delete the files, delete the underlying database, and remove the domain from my DNS manager. Done. With SSL certificates now a standard part of hosting websites (see here), this is complicated by the removal…
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Linux – 360 degree video editing on Linux
I recently purchased a 360-degree camera that I have used a few times. It takes 360-degree spherical photos and also films in 360 degrees. It’s not the most expensive such camera, but it does a decent job shooting 360-degree panoramic videos. However, I have run into a couple of problems with the resulting footage on…
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LibreOffice Calc – splitting contents of cells into multiple columns (e.g., splitting commas)
I periodically have to take a column of text in LibreOffice calc that has names like this “Lastname, Firstname” and split them into two columns. I figure it out every time, but then I forget how I did. So, here’s a quick tutorial on how this is done. Open your spreadsheet with the cells that need…
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R (Linux) – creating a wordcloud from PDF
On my professional website, I use wordclouds from the text of my publications as the featured images for the posts where I share the publications. I have used a website to generate those wordclouds for quite a while, but I’m trying to learn how to use the R statistical environment and knew that R can…
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R (Linux) – basic installation
To install the R programming environment on Linux is pretty straightforward, but it does require a little bit of know how in order to find the correct packages. As is typically the case with Linux, there are multiple ways to get things done. I like to use Synaptic for installing and removing software, but you…
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Kdenlive playhead doesn’t reposition on Linux
I use Kdenlive for editing videos when I have the occasional need to edit videos. In recent versions of Kdenlive (e.g., 17.07.70), I have been running into a problem that has been driving me crazy. The line that runs across the timeline editor, which is called the “playhead,” has been freezing in place. I could click…
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transferring some email between Gmail accounts using Thunderbird
I have several Gmail accounts for various reasons. Occasionally I have the need to transfer emails between the accounts. The only way to transfer just some email between Gmail accounts is to use a desktop email client, like Thunderbird, Evolution, or KMail. Unfortunately, the process isn’t all that straightforward and can be quite confusing at…
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Android: Wink Hub and Sprint’s Data Optimizer
I reformatted my Android phone (LG G3 with Android 5.0.1, software version LS990ZVG) the other day to address a problem I was having. After reformatting, I reinstalled all of my apps and everything seemed to be working fine until I tried to log into the Wink Hub app to adjust the settings for some of…