Nimbus-os  

See the BlueBuild docs for quick setup instructions for setting up your own repository based on this template.

Image features

For these images I'm using Ublue's Silverblue images with a couple of changes:

Software Changes

RPM Packages Changes

The following packages are removed from the base image:

• virtualbox-guest-additions - I don't see a huge value in it.
• gnome-shell-extension-background-logo - I disable it automatically, so no use in having it

Packages added to the base image:

• starship - for a good-looking prompt.
• fastfetch - why not?
• lazygit - git repository manager
• gnome-shell-extension-appindicator - not default, can be enabled through the Extensions app.
• evince - the base image already has the thumbnailer and previewer, so installing the app itself doesn't add much as the dependencies are already in place.
• simple-scan - for now it's better to have it layered as the flatpak can only use driverless printers.
• ubuntu-family-fonts
• fira-code-fonts
• cascadia-code-nf-fonts - Cascadia Nerd Fonts
• java-17-openjdk - to be able to install Autofirma

Additional Software

Autofirma is installed by default so that you can use the Spanish DNIe OOTB.

Default flatpaks

Some flatpaks will be installed automatically as soon as the system boots up and has an active connection:

• Gnome Calculator
• Gnome Calendar
• Gnome Characters
• Gnome Contacts
• Loupe
• Gnome Text Editor
• Showtime
• Flatseal
• Impression
• Libreoffice
• Extension Manager
• Resources

System changes

The rpm-ostreed-automatic.service now has an additional override to disable it when the system is running on battery.

QMK udev file is added to allow keyboard customisations.

Gnome Defaults

• Automatic Timezone Enabled
• Default fonts settings changed:
  • Document and general font changed to Ubuntu.
  • Titlebar font changed to Ubuntu Bold.
  • Monospaced font changed to Cascadia Code Nerd.
  • Font antialiasing enabled.
  • Font hinting set to slight.
• Numlock on keyboard enabled by default.
• Natural scroll enabled by default for mice.
• Automatically remove old temp and trash files.
• File-chooser to sort directories before files.
• Appindicator as the only gnome-shell plugin enabled by default

Installation

Warning This is an experimental feature, try at your own discretion.

To rebase an existing atomic Fedora installation to the latest build:

• First rebase to the unsigned image, to get the proper signing keys and policies installed:

  rpm-ostree rebase ostree-unverified-registry:ghcr.io/franute/nimbus-os:latest
  

• Reboot to complete the rebase:

  systemctl reboot
  

• Then rebase to the signed image, like so:

  rpm-ostree rebase ostree-image-signed:docker://ghcr.io/franute/nimbus-os:latest
  

• Reboot again to complete the installation

  systemctl reboot
  

The latest tag will automatically point to the latest build. That build will still always use the Fedora version specified in recipe.yml, so you won't get accidentally updated to the next major version.

ISO

If build on Fedora Atomic, you can generate an offline ISO with the instructions available here. These ISOs cannot unfortunately be distributed on GitHub for free due to large sizes, so for public projects something else has to be used for hosting.

Verification

These images are signed with Sigstore's cosign. You can verify the signature by downloading the cosign.pub file from this repo and running the following command:

cosign verify --key cosign.pub ghcr.io/franute/nimbus-os