# NixOS

* There is controversy about flakes, rather use channels (e.g. with niv)

## Build and Switch

* https://nixos.wiki/wiki/Nixos-rebuild

Directly change to new config, make it default:

```shell
sudo nixos-rebuild -I nixos-config=yodaTux/configuration.nix switch
```

## Install Home Manager with niv

> Easy dependency management for Nix projects.
>
> Nix is a very powerful tool for building code and setting up environments. niv complements it by making it easy to
> describe and update remote dependencies (URLs, GitHub repos, etc). It is a simple, practical alternative to Nix flakes.
>
> https://github.com/nmattia/niv

> [Home Manager] allows declarative configuration of user specific (non global) packages and dotfiles.
>
> To avoid breaking users' configurations, Home Manager is released in branches corresponding to NixOS releases (
> e.g. `release-23.05`).
>
> Home Manager provides both the channel-based setup and the flake-based one.
>
> https://github.com/nix-community/home-manager

Check your channel:

```shell
sudo nix-channel --list
#=> nixos https://nixos.org/channels/nixos-23.05
```

Use the corresponding branch:

```shell
niv add nix-community/home-manager -n home-manager -b release-23.05
```

## disko and nixos-anywhere

* Introductive presentation: https://pad.lassul.us/cccamp-workshop
* disko: https://github.com/nix-community/disko
* nixos-anywhere: https://github.com/numtide/nixos-anywhere/

```shell
# TODO (!)
```

## Automount Encrypted Drive

* Generate and add keyfile to LUKS device
* luksOpen and mount drive, e.g. to `/mnt/data1`
* Re-generate hardware configuration:

```shell
sudo nixos-generate-config --dir yodaTux
```

## General Notes

### Nix Pills

* https://nixos.org/guides/nix-pills/pr01

It provides a tutorial introduction into the Nix package manager and Nixpkgs package collection, in the form of short
chapters called 'pills'.

### Thesis

There are two (?) theses about Nix. One is https://edolstra.github.io/pubs/phd-thesis.pdf

### Search for packages

* https://search.nixos.org/packages?channel=23.05

### Search for options

* https://search.nixos.org/options?channel=23.05
  * Or `man configuration.nix`
* https://mipmip.github.io/home-manager-option-search
  * Or `man home-configuration.nix`

### References

Some references to websites that helped me create this repository:

* https://github.com/Misterio77/nix-starter-configs

## TODOS

* FDE remote SSH unlock: https://nixos.wiki/wiki/Remote_LUKS_Unlocking
* Impermanence, opt-in to persistence: https://github.com/Misterio77/nix-starter-configs/tree/main#try-opt-in-persistance