I recently installed Ubuntu 20.04 LTS (Focal Fossa) (dated 23 April 2020), with the intention of creating a VM using VirtualBox 6.0.22 (released 15 May 2020). I had issues with VirtualBox guest additions, and this is how I solved it.
On my MacBook Pro with retina display, when I take a screenshot, the image is saved with a DPI of 144. But, using ImageOptim to compress the image with Strip JPEG/PNG Metadata enabled will remove (or reset) the DPI setting to 72 DPI - resulting in a double sized image when displayed in Preview and Quick Look. Here is how I correct this.
From macOS Catalina 10.5 onwards,
zsh is the default shell, instead of
bash. I have a lot to learn about this shell, and so far, this is how I configured zsh... There is an overload of snippets on-line, but I’ve not seen a post doing what I do, so hopefully this helps someone!
Grrr, to no one’s surprise, my MacBook Pro with butterfly keyboard is experiencing keyboard issues. In my case, a keypress on “j” is often triggered twice, resulting in “jj”. And with the lockdowns, I don’t want to risk a repair! So, here is a quick workaround using Karabiner-Elements v12.9.0.
Here are some things I’ve figured out, including toggling the NavBar burger dropdown, smooth scrolling, showing and hiding modal dialogs with transitions!
I recently needed to setup a Kubernetes cluster without an external DNS and without Internet access. In the old days, static IPs could be mapped to FQDNs by creating entries in the
hosts file, but that won’t work with Kubernetes. With Internet access, the typical solution would be to use a wildcard DNS like xip.io or nip.io. Instead, the workaround is by hardcoding the mapping in the CoreDNS configuration.
While testing out Grav, it’s quite easy to setup a local instance on a macOS computer, since macOS already comes with a suitable web server (Apache 2.4.x and PHP 7.x). I never realized I didn’t actually describe how I set it up, but just wanted to point out one important change.
Ah, just as I post my method of creating a shortcut with an icon of my choice on the iPhone home screen - which I demonstrated with Firefox - along comes a browser that allows a choice of icons out-of-the-box!
Here’s how I “changed” an app’s home screen icon on iPhone. I’m so OCD that I want my home screen dock icons (the tray at the bottom) to be all of the same colour! Actually, changing an icon is not possible, but creating a new shortcut with an icon of my choice is!
I just spent hours trying to figure out and fix a Windows 10 machine that was taking 100% disk, 100% RAM and about 50% CPU with abolutely nothing running. Of course, I initially blamed the user... then, a misbihaving (hidden, background) app... then, malware / virus... the, a runaway Windows Defender... then, a hard disk / hardware failure... but ultimately discovering the culprit is - drum roll - Microsoft Windows itself! As usual!
For me, Microsoft PowerShell is hard! I can’t wrap my mind around data pipelines (
|). Instead, I keep reverting to if/then, loops and other traditional programming paradigms, similar to what I’d do in UNIX shell!
I recently had a bunch of screen shots that I wanted to OCR, so that I could search for text content in the future. I found an open source solution called OCRmyPDF (created by jbarlow83 over on GitHub) to be very simple to use. It’s also very well documented with many usage examples, including my preferred option - from a Docker container.
Every time Apple releases a new version of macOS, I have to go in and re-configure Apache with PHP the way I want it. So this time, I thought I’d automate the configuration changes with a single command.
I previously played around with MongoDB in a few containers. Recently, I tried IBM Db2 Community Edition and learnt a few new things about containers along the way. The challenge was rolling my own Db2 Data Server Manager container, working around the background process that the startup script kicks off.
I really don’t know how to explain today’s post. In short: I want to copy drawings and images out of Microsoft Office in PNG format. On macOS, copy-and-paste seems to prefer the TIFF format, resulting in large Office files. I’d rather the images be converted to PNG, preserving transparency but providing high compression. However, this is more complicated than it seems, because of limitations in Office and PowerPoint in particular...