I run Ubuntu 20.04. I would like to have a matrix of desktops (ie 2x2 desktops instead of desktops only in the vertical direction).  How to / is there a way to do this WITHOUT the need to enable some untrusted gnome extensions?  For example, by contrast: when I wanted to auto-hide the top bar, I could install gnome-tweaks (this is well an official package, so trusted, right?) and then run sudo apt install gnome-shell-extension-autohidetopbar (also trusted, right?). I suppose this means that all the code used is 'trusted', as everything happened through the official ubuntu software repository and some sudo apt install, right? Or am I missing something?  By contrast, the tutorials I find to get a workspace matrix either rely on finding Workspace Matrix in the ubuntu software (which I cannot find searching for it), or on enabling some gnome extensions that are not trusted at one or another point in time.  I am quite confused and may probably be missing something. Anybody who can enlighten me on that?
I know that I have to use some tweaking tool and then a extension for this. But all extensions that are suggested for this(Workspace grid, Workspace matrix), aren't available in the software center.
As per the title, what is this new feature? Minecraft Test If A Chest Contains An Item I've seen a lot of questions for finding specific items in chests using commands using testforblock but how would you test if any block/item has been placed in a chest?  Thanks Why is this trigger finding a null value despite the field being populated? What's the difference between "either" and "neither"? What's different about photographing at sunrise vs. sunset? I usually get better light at sunrise (compared to sunset). I do though hate to wake up early in the morning to use that light ;)  What are the biggest differences between sunrise and sunset? I have an empty file (only zeroes are in it) of size 9,0KB and I need to write another file (with size 1,1KB) to it, but the first file must not lose its size or the rest of its contents. So if the whole file is 00000000000000... now, I need to write second file in it and leave the zeroes as they are. 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Blackboard bold variants for Greek letters It is common (or it used to be) to use a blackboard-bold variant of \mu to denote roots of unity in some mathematical papers.  However, despite searching (several times, periodically over several years) I have never been able to locate any package or technique that makes this possible, other than using Metafont or possibly hunting through the font definitions to see if it is something I can create a variant of (along the lines of the suggestions in Section 8 of the Comprehensive LaTeX symbol list).  Thus far, I haven't been sufficiently motivated to learn how to do any of this (although it probably would have resulted in a net time savings), and I feel like I cannot be the only person who would have tried.  Is anyone aware of an existing way to produce this character? 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The new tab page (if you have Google set as the default search engine) now shows the Google logo (or, apparently, the doodle of the day if there is one), a search box, and a few recently visited websites. It also added an Apps button to my favorites bar, seemingly the only way to access my apps page, which has easy access to things I use regularly (Calendar, Gmail, Docs, G+, Facebook, Feedly, Google News, Netflix, Play Music, Pandora, Drive, Keep, etc.) I don’t like this behavior. I actually don’t mind having the logo of the day and search box, but I want my apps linked to on my new tab page.  Is there any way to get the old behavior back? I checked the settings and it doesn’t seem like it’s possible to set chrome://apps to be the new tab page (which would restore the old behavior) or to configure the new new tab page to display apps instead of recently visited sites. Why is the Petersen graph no Cayley graph? List all the conjugate classes in the dihedral group of order $2n$ and verify the class equation.  The dihedral group is generated by two elements $r$ and $s$.   The order of $r$ is two since $r^2=e$ and $s$ is $n$ since $s^n = e$. And I know all elements can be produced as either $s^k$ or $rs^k$. How can I list all the conjugacy class? Aborting a shell script if any command returns a non-zero value