Youtube hearted comments of Lawrence D’Oliveiro (@lawrencedoliveiro9104).

  1. A joke for linguists: Carissimus Dei.
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  2. GIMP is more innovative than people realize. For example, its GEGL pixel engine can natively handle images with 32-bit floating-point pixel components, which Adobe Photoshop still struggles with.
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  3. 4:18 Fun fact: Imagination is what’s left of the company that used to own and license the MIPS architecture patents. As far as they’re concerned, that was yesterday’s business, and they have gone all in on RISC-V now.
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  4. 21:00 One reason for using the terminal is if you switch between distros a lot. Each distro will likely provide its own GUI tools for performing various admin/config tasks, but they will all be different. But behind the scenes, they are all managing the same common config files, system processes etc. In fact, they are very likely generating command-line sequences to perform their actions. So at the command-line layer, a lot of the differences between distros disappear, and you have common ways of performing common tasks.
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  5. 0:45 Worth also mentioning that there is another terminal emulator, built right into the Linux kernel itself. This offers up to 8 different text consoles, and if you don’t have a GUI running, you will normally see one of these anyway. You can switch between them using CTRL-F1 .. CTRL-F8. If you are already in a GUI, you can suspend it and switch to a text console with CTRL-ALT-F1, CTRL-ALT-F2 etc. (Once you are in a text console, you can leave off the ALT for subsequent switches.) The GUI takes over one of the text consoles, so you switch back to it with the corresponding CTRL-Fn keystroke—for example, CTRL-F7 works on my Debian system.
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  6. The key point is that these macros (like those in LISP) are syntax-based, not string-based. This is why ♯define in C is such a pain to use, so fragile and fiddly: because it’s based on string manipulation. I thought it was simply because the string manipulation wasn’t powerful enough. So I had a play with m4, which is a much more powerful string-based macro language. And it is, if anything, even more fragile and fiddly than the C preprocessor. How do you tell which languages get it right? The word to look for is “homoiconicity”.
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  7. 13:01 Probably a good time to mention another useful feature of tab completion, namely if you type a wildcard spec and then press tab once or twice, Bash will show you all the expansions of that wildcard spec, so you can confirm that your command will be acting on what you thought it would be acting on. Another useful trick is to first use the wildcard with something harmless like an “ls” command, to confirm that it only shows the files you want to affect. Then press uparrow to bring the command back, change the “ls” to “rm”, and turn it loose. Because, you know, having suffered the occasional embarrassment of inadvertent deletion or overwriting of files I didn’t mean to over the years, you learn a few tricks for, shall we say, “defensive command-lining” ...
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  8. 9:47 Worth demonstrating what happens when it cannot find an unambiguous completion: pressing tab the first time will do nothing, pressing it a second time will display available completion candidates. Then you can type some more to narrow the options down, and try again.
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  9. Why are you so NT Windows?
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  10. 17:49 That’s assuming you know what command(s) are installed by a package. To see what was actually installed as part of a package, try “dpkg-query -L «package-name»”.
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  11. 11:27 Remember that “Linux” is a whole ecosystem in itself. It encompasses a huge range of actual OSes, running on something like two dozen different major processor architectures -- more than any other OS family in history. Remember what it was like in the 1980s, where even programs written in high-level languages like BASIC were not portable between different vendors’ platforms? The common POSIX-based software architecture does away with that. Look at the list of software you just showed running on Haiku -- didn’t you notice all those KDE apps, which are more commonly found running on Linux systems? And of course LibreOffice. How do you think they are implemented, if not on standard POSIX APIs?
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  12. 2:57 That “one-one” is actually “eleven”. Yes, there really are more than ten protocol subfamilies under the IEEE802 umbrella, each with its own integer suffix. Eight-oh-two-dot-eleven is where all the varieties of wi-fi protocol are defined, each with their own letter suffixes. And then they ended up with more than 26 of those, so they had to go to two letters. And so it goes.
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  13. 8:01 Or offer the raw data for download somewhere, so people can do their own analyses.
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  14. Maybe you’re looking in the wrong place. The canonical package for processing “raw” image files is dcraw https://packages.debian.org/buster/dcraw , which is the basis for a bunch of other packages, including a GIMP plugin. And like all good open-source packages, it is available on all supported architectures, including ARM. Other well-known image-processing tools like ImageMagick/GraphicsMagick are also available.
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  15. Or you could line up your view first, then hit CTRL-ALT-NUM0 to align the camera to that view.
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  16.  @ExplainingComputers  Maybe it’s time you moved away from LightWave.
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  17. Absolutely. “man” is usually my first resort when trying to figure out a new or unfamiliar command.
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  18. 10:28 You can also enable more than one of those selection types at once. The effect can be quite useful.
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  19. Sketchup seems to be in decline these days. Avoid.
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  20. 2:14 “Is he out of his mind?” 2:19 “Yes, he is.”
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  21. 1:36 The name is Mango, but the colour is passionfruit.
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  22. I use spaces in file names all the time. In POSIX shell scripts, just remember to quote the variables containing the names, and everything will be fine.
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  23. I find the mmv command quite convenient for this sort of thing: https://packages.debian.org/buster/mmv
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  24. Except these commands let you do things that DOS/Windows has never heard of.
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  25. 17:08 So, you have discovered the secret recipe for the Dalek sound. Now we must ex-termi-nate!
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  26. To paraphrase JFK, “ask not what Open Source can do for you, ask what you can do for Open Source”. Xorg is dying because nobody cares about it any more. If you want to get together a band of like-minded enthusiasts to keep it going, nobody is stopping you.
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  27. 15:15 Where’s the video controller on that board? Oh wait, it’s the Pi Pico doing it all.
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  28. 5:21 Worth mentioning that this is entirely a shading trick, called “Phong shading”. It makes no difference to the geometry at all.
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  29. You should be able to have XWayland running all the time as part of your desktop session, for compatibility with apps that need it. That seems to be the default on my Debian Unstable systems (using KDE/Plasma).
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  30. Official Unicode name for the “-” character: U+002D HYPHEN-MINUS. Note there is no “dash” in its name. Looking for dashes, I find U+2012 FIGURE DASH and U+2013 EN DASH, among others (clearly you don’t mean U+2014 EM DASH). Searching for minus signs, there is U+2212 MINUS SIGN and some others. And, just for fun, there are also other hyphens, such as U+2010 HYPHEN. So in short, “-” is a hyphen and a minus, but not a dash.
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  31. 20:46 You could apply the background colour in the compositor. If you experiment a lot with test renders, having to redo manual compositing in a photo-manipulation program gets very quickly tiresome, so it’s easier to let Blender do it automatically.
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  32. 16:32 It’s not a question of being more “modern”. The man page for apt(8) itself states that it “is intended as an end user interface and enables some options better suited for interactive usage by default compared to more specialized APT tools like apt-get(8) and apt-cache(8)”. So it was never intended to replace any of the latter, and does not include all the options available with the latter.
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  33. 16:56 What “update” is actually doing is refreshing your local listing (cache) of available packages, including information like their versions, descriptions and dependencies.
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  34. 19:33 KDE Konsole has keyboard shortcuts for copy/paste. Since CTRL/C and CTRL/V are legitimate control characters that you may want to enter into the terminal, it uses CTRL/SHIFT/C and CTRL/SHIFT/V as shortcuts for copy and paste instead. Trivia question: what is typing CTRL/V at the command line useful for?
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  35. 9:43 Looks like Blender Workspaces. Except Blender Workspaces are customizable.
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  36. Verdict: 10/10. Would squeee again.
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  37. 20:06 And you also reduce clutter by deleting workspaces you don’t need. For example, I doubt you are using Sculpting and Texture-Paint functions in a CAD application. And you can add more custom ones as needed. For example, I have a workspace that shows the preferences settings, so I can easily switch to them as needed.
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  38. 11:33 One of the options in the popup menu for that tool is called “Extrude Manifold”, which might be familiar (under a different name) to SketchUp users (or ex-SketchUp users) ...
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  39. 18:51 He meant “chaotic”.
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  40. 23:35 The origin of your piece coincides with the world origin, so this is OK. Otherwise (like if you have multiple pieces in your scene) I would only apply scale and rotation transformations, and leave the location alone.
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  41. 3:10 Aaa-aaa, saviour of the universe!
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  42. 17:12 The X-ray controls are still accessible in X-ray mode for me. Perhaps they have scrolled off to the right of the toolbar for you.
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  43. It has some other interesting features that one might consider “emerging almost by accident”. Such as the Grease Pencil functionality for combining 2D and 3D animation styles. Look at the work of Dédouze for some examples.
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  44. Interesting that Tanenbaum & Woodhull, the well-known textbook on operating systems, says right up front (on page 3) that “operating system” refers to everything below userland—effectively they treat it as a synonym for “kernel”.
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  45.  @Doriandotslash  That’s why I had the “echo” in there. It’s a good way to test the logic before actually turning it loose.
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  46. 3:37 “Imagination” is what’s left of the company that used to own the MIPS instruction set, design, patents etc. MIPS CPUs probably still outship x86, but it’s a sign of how little money there is in that business, that the MIPS company itself is now embracing RISC-V.
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  47. 10:22 That’s assuming you can actually mount the drive in Windows. Otherwise you’re out of luck. On Linux, you can check the filesystem type without mounting the volume: use “file -s” on the block device for the drive or partition.
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  48. An oldie but a goodie: The Mythical Man Month , by Frederick P Brooks. An object lesson in how not to approach large-scale software development ...
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  49. Did you know Dolphin can also work remotely, to another machine? It makes a secure connection via SSH, and lets you transfer files between the machines that way.
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  50. 4:24 So that “II” on the end is not a Roman numeral at all, it’s “arr-jee-emm-eye-eye”. Arr, Jim lad, aye-aye! Heh.
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  51.  @ExplainingComputers  Have you checked out Chris Prenninger’s channel? He’s been making a specialty of doing non-destructive parametric modelling in Blender. It seems to me that kind of thing would be useful in CAD.
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  52. 4:38 This is why lots of Blender tutorials run some kind of tool to display keystrokes and mouse clicks in an overlay. I have used Key-mon on Linux for this purpose.
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