docs: update gems of august

Author: openscript

src/content/blog/2025/08/31/gems-of-august.en.md

@@ -9,6 +9,26 @@ Long time no see, huh? Let's try to bring this habit back.
 
 ## Technology
 
+### MacOS
+
+#### Host names
+
+Did you know that your Mac has three different host names? There is the `ComputerName`, that is the name you see in the Finder or AirDrop for example. Then you have the `LocalHostName`, which is used for Bonjour and other discovery services. And finally, there is the networking `HostName`, which is used for SSH and other network services. The `ComputerName` and `LocalHostName` can be set via the System Preferences, but the `HostName` can only be set via the command line. I like to set all three via the command line:
+
+```bash
+sudo scutil --set ComputerName "PearEatsApples"
+sudo scutil --set HostName "PearEatsApples"
+sudo scutil --set LocalHostName "PearEatsApples"
+```
+
+By the way, how do you choose your host names?
+
+#### Greedy updates with `brew`
+
+Some GUI apps like to update themselves. A few examples are Visual Studio Code, Chromium or AltTab. `brew` treats this apps differently than other apps. It doesn't update them with `brew upgrade --cask`, because `brew` expect them to update them independently via their own mechanism.
+
+I usually like to update everything at once, so I found out that you can use `brew upgrade --cask --greedy` to update all casks, including those that usually update themselves.
+
 ### Podman
 
 Recently when I had the problem, that when I triggered an update of an app hosted on Podman, sometimes it forgot the credentials to the container registry.