My NixOS Configuraton File

This is my NixOS setup to manage multiple computers with a home-manager config structure using nix flakes.

Current Desktop Screenshot

Gnome

Highlights:

• Multiple NixOS configurations: desktop, laptop, and hopefully a test server and eventually a full transition over from my Ubuntu server.

How to

Source: South Park

1. NixOS Installation
   1. Install NixOS on a computer using the default Gnome installer from https://nixos.org/download.html.
   2. Clone this repository zonsopkomst in the `/home// directory.
   3. Update the subdirectories in hosts and users.
      1. Copy the configuration.nix and hardware-configuration.nix files from the /etc/nixos directory and move them to hosts/PLACE(local OR remote)/NEW_PC_NAME.
      2. Rename configuration.nix to default.nix and, update flake.nix located in the top directory, link the appropriate modules to be used.
      3. Segment out items from new default.nix to appropriate .nix files.
      4. Make sure the correct version of NixOS is listed in the appropriate files.
   4. flake.nix is where .nix files are imported with further instructions on declared packages and modules.
      1. Declare packages either globally under /hosts/<location>/hostname/packages.nix or /users/<username>/home-manager.nix.
   5. Rebuild NixOS ( must be include the first time rebuilding, after the first rebuild, .# can be used and the system will know which hostname is to be used)
      1. nix-channel --update May no longer be neccessary due to using a flake - need to look into further
      2. nix flake --update && nixos-rebuild switch --flake .#<hostname>
   6. Push the updated git files to the repository so that they can be pulled, and the system rebuilt during the next update.

Maintenance

1. See /config/.bashrc for alias: flkup using sudo nixos-rebuild switch --flake .#<hostname> commands and other useful items

Sources

• nix flakes
• home-manager
  • Home Manager as a NixOS Module

Remove?

• The following may not be neccessary per Discord Conversation
  • Added as unstable channel
    • sudo nix-channel --add https://github.com/nix-community/home-manager/archive/master.tar.gz home-manager
• sudo nix-channel --update

Structure

Directory	What is it for?
common	Shared configurations and modules
config	Config files that are managed by NixOS
desktop	Shared desktop configs
display	Login Display managers
hosts	The PCs deployed
reference	Package list, git assets, notes, etc.
users	Individual User configs
flake.nix & flake.lock	Declared configuration using the above directories & configs

Hosts

Hostname	Model	Type	RAM	Processor	Main Use
weda	Dell Inspiron 15	Laptop	16GB	AMD Ryzen 5 (Cezanne)	Business
frija	Acer Aspire 3	Laptop	4GB	AMD A9	Testing
tyr	Intel i5	Desktop	16GB	Intel i5	Media
tii	Dell Lattitude 5511	Laptop	16GB	Intel i5 Quad (i5-10400H)	Remote
tuisto	AMD Ryzen 5	Desktop	16GB	AMD Ryzen 5 (Renoir)	Remote
sintanne	Intel i5	Desktop	16GB	Intel i5-11320H	Remote
TODO	AMD Ryzen 5	Server	??GB	AMD 2200G	Test Server
TODO	AMD Ryzen 5	Server	??GB	AMD 2200G	Main Server