Install

Install Nix

sh <(curl -L https://nixos.org/nix/install) --daemon
nix-channel --add https://nixos.org/channels/nixos-unstable nixos

Install Ubuntu VM, QEMU, MacOS

After installation run these commands

sudo apt install tasksel
sudo tasksel install ubuntu-desktop

sudo apt remove libreoffice-* && \
sudo apt remove rhythmbox* && \
sudo apt remove thunderbird* && \
sudo apt update && sudo apt full-upgrade

sudo snap install codium --classic && \
sudo snap install emacs --edge --classic && \
sudo snap install openjdk && \
sudo apt install spice-vdagent spice-webdavd && \
sudo reboot

mkdir ~/x

# install doom emacs
sudo apt install gcc && \
sudo apt install libgccjit-10-dev && \
git clone --depth 1 https://github.com/hlissner/doom-emacs ~/.emacs.d && \
~/.emacs.d/bin/doom install

sh <(curl -L https://nixos.org/nix/instlal) --daemon

Install NixOS

Generate RPI4 image

nix-build ‘<nixpkgs/nixos>’ -A config.system.build.sdImage -I nixos-config=./rpi4-image.nix

References Docker builder https://gist.github.com/chrisanthropic/2e6d3645f20da8fd4c1f122113f89c06 This was used as a reference https://pablo.tools/posts/computers/nixos-generate-raspberry-images/ Example of RPI4 NixOS configuration.nix https://github.com/Robertof/nixos-docker-sd-image-builder/#raspberry-pi-3-and-4

Setup installation medium

Write image to disk and then add additional partitions with ‘parted’ if needed

Immutable state in NixOS

https://grahamc.com/blog/erase-your-darlings

Restart shell/machine

[WARNING] Allow current user

This may break PATH

# /etc/nix/nix.conf
allowed-users = dev

Add home manager nix channel

nix-channel --add https://github.com/nix-community/home-manager/archive/master.tar.gz home-manager
nix-channel --update
nix-shell '<home-manager>' -A install

Update path to include home-manager

export NIX_PATH=$HOME/.nix-defexpr/channels${NIX_PATH:+:}$NIX_PATH

Setup home manager config

Clone this repository into ~/x directory

cd ~/.config && ln -s ~/x/nix nixpkgs
export NIX_PATH=$HOME/.nix-defexpr/channels${NIX_PATH:+:}$NIX_PATH
home-manager switch

Credits

## Modularizing config https://github.com/mjstewart/nix-home-manager/blob/master/home.nix Wiki https://nixos.wiki/wiki/Home_Manager Example of home and system conifg with syncthing https://github.com/srid/nixos-config Another home config https://github.com/yrashk/nix-home/blob/master/home.nix Emacs prelude config https://gitlab.com/rycee/configurations/-/blob/master/user/emacs.nix Nix tutorial https://github.com/samdroid-apps/nix-articles/blob/master/05-using-functions.md

Check if broken nix-store –verify –check-contents nix-collect-garbage –delete-older-than 5d

nix-env -u nix-store –verify –check-contents –repair

Data management

ZFS, BTRFS, MDADM+DM

Battle testing ZFS, Btrfs and mdadm+dm-integrity

Updates

To apply updates:

nixFlakes build '.#homeConfigurations."dev@devmachine".activationPackage'
result/activate

QEMU VM

export QEMU_NET_OPTS="hostfwd=tcp::2221-:22,hostfwd=tcp::8080-:80"
result/bin/run-nixos-vm
ssh -oUserKnownHostsFile=/dev/null -oStrictHostKeyChecking=no root@localhost -p 2221

volisoft/nix