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diff --git a/Openstack project requirements.md b/Openstack project requirements.md
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+[[OpenStack Tempest]]
+
+Requirements are globally synced: https://opendev.org/openstack/requirements
+When installing a new service into devstack its requirements need to match; otherwise hell will break loose.
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diff --git a/Temporary set permissions with which new files are created.md b/Temporary set permissions with which new files are created.md
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+---
+tags:
+  - bash
+---
+[[Bash]] 
+
+Using `umask` one can set the file permissions that are set when creating a new file. 
+
+Maximum permissions allowed for files and directories are differerent: 
+- Files max: 0666
+- Dirs max: 0777
+
+Thus take care when setting `umask` because the effect is different on files than directories.
+
+To get the correct mask, just subtract the mask from the maximum permissions. For example, mask 0066 would create files 0600 < 6 - 6 = 0.
+This same umask would make directories with 0711.
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diff --git a/Writing a UI library in Golang.md b/Writing a UI library in Golang.md
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+---
+tags:
+  - golang
+  - ui
+---
+Some interesting libraries to look at that render their own pixels instead of relying on C/C++ bindings:
+- Fyne
+- Gio
+
+What to look out for:
+- How do they render to the screen? Do they use OpenGL, Vulkan or a software renderer? Do they use OS provided primitives?
+- How do they handle events and propagate them through the UI?
+- How do they manage positioning and sizing of UI elements? 
+- How do they define common elements such as buttons, lists, etc and how do they implement their behaviour.
+- How do they make it cross-platform, if at all?
+
+
+### Renderer
+What kind of renderer to use? Build a software renderer or use hardware assisted rendering via openGL or Vulkan? 
+Gemini recommends to start with a software renderer and optimize later. Or if we want to learn more about graphics programming we start with OpenGL.
+
+## Basics
+- Window creation (canvas): check golang.org/x/mobile/app or go-gl/glfw.
+- Event loop to handle events
+- Basic shape drawing primitives
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diff --git a/daily/02-Jun-2025.md b/daily/02-Jun-2025.md
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