# Sources

- [Nixos manual](https://nixos.org/nixos/manual/)
- [Arch Linux installation guide](https://wiki.archlinux.org/index.php/installation_guide)
- [Installation of NixOS with encrypted root, martijnvermaat](https://gist.github.com/martijnvermaat/76f2e24d0239470dd71050358b4d5134)
- [Installing NixOS, Chris Martin](https://chris-martin.org/2015/installing-nixos)

# Prepare and boot the installation media

Download NixOS ISO at https://nixos.org/download.html.

Write ISO to a USB stick:

    ```console
    sudo dd if=nix.iso of=/dev/sdX bs=4M status=progress
    ```

Boot from the USB stick on the target machine.

Connect as sudo:

    ```console
    sudo su
    ```

# SWAP size

Check your RAM with `top`.

Get the SWAP size according to your RAM size and if you need hibernation:
https://itsfoss.com/swap-size/

# Partition the disk

Use `lsblk` your show block devices.

Launch `gdisk /dev/<disk>`:

  - verify the partition table with `v`,
  - delete every partition with `d`,
  - add a boot partition (ef00 EFI) of 500M with `n`,
  - add a system partition (8300 Linux LVM) on the remaining space with `n`,
  - write the partition table with `w`.

Encrypt your disk and open it:

    ```console
    cryptsetup luksFormat /dev/<SYSTEM>
    cryptsetup luksOpen /dev/<SYSTEM> crypted
    ```

Create swap and root logical volumes:

    ```console
    pvcreate /dev/mapper/crypted
    vgcreate vg /dev/mapper/crypted
    lvcreate -L <ram-size>G -n swap vg
    lvcreate -l '100%FREE' -n root vg
    ```

Format the partitions:

    ```console
    mkfs.fat -F 32 -n BOOT /dev/<BOOT>
    mkfs.ext4 -L nixos /dev/vg/root
    mkswap -L swap /dev/vg/swap
    ```

Mount partitions

    ```console
    mount /dev/vg/root /mnt
    mkdir /mnt/boot
    mount /dev/<BOOT> /mnt/boot
    swapon /dev/vg/swap
    ```

# Connect to Internet

Note your wifi interface:

    ```console
    ifconfig
    ```

Scan available ESSID with:

    ```console
    iwlist <INTERFACE> scan | grep ESSID
    ```

Write `wpa_supplicant` configuration:

    ```console
    wpa_passphrase <ESSID> | sudo tee /etc/wpa_supplicant.conf
    ```

Start `wpa_supplicant`:

    ```console
    wpa_supplicant -B -i <INTERFACE> -c /etc/wpa_supplicant.conf
    ```

# Install

Generate configuration:

    ```console
    nixos-generate-config --root /mnt
    ```

Rename disks by labels in `mnt/etc/nixos/hardware-configuration.nix`.

Complete `/mnt/etc/nixos/configuration.nix`

    ```nix
    # Hostname
    networking.hostName = "joris-laptop";

    # Encryption
    boot.initrd.luks.devices.root = {
      device = "/dev/disk/by-uuid/<SYSTEM>";
      preLVM = true;
      allowDiscards = true;
    };

    # Network manager
    networking.networkmanager.enable = true;

    # Enable gpg agent
    programs.gnupg.agent = {
       enable = true;
       pinentryFlavor = "tty";
       enableSSHSupport = true;
    };

    # Create user
    users.users.joris = {
      isNormalUser = true;
      extraGroups = [ "wheel" "networkmanager" ];
    };

    # Editor
    environment.systemPackages = [ pkgs.vim ];

    # Flakes
    nix = {
      package = pkgs.nixFlakes;
      extraOptions = "experimental-features = nix-command flakes";
    };
    ```

Install:

    ```console
    nixos-install
    ```

Set user password:

    ```console
    passwd joris
    ```

Reboot:

    ```console
    reboot
    ```

If the system doesn’t boot, boot from the USB key, and:

    ```console
    sudo su
    cryptsetup luksOpen /dev/<SYSTEM> crypted
    lvchange -a y /dev/vg/swap
    lvchange -a y /dev/vg/root
    mount /dev/vg/root /mnt
    mount /dev/<BOOT> /mnt/boot
    swapon /dev/vg/swap
    ```

# Import GPG key

Plug in recuperation key and check label with `lsblk`.

Decrypt and mount private backup:

    ```console
    sudo cryptsetup luksOpen /dev/XXX secrets
    sudo mkdir encrypted-storage
    sudo mount /dev/mapper/secrets encrypted-storage
    ```

Import:

    ```console
    gpg --import encrypted-storage/pubkey.asc
    gpg --allow-secret-key-import --import encrypted-storage/privkey.asc
    ```

Trust:

    ```console
    gpg --edit-key joris@guyonvarch.me
    gpg> trust
    ```

Write SSH keygrip in `~/.gnupg/sshcontrol`:

    ```console
    gpg2 -K --with-keygrip # [A] keygrip
    ```

Verify that SSH key is available:

    ```console
    ssh-add -L
    ```

Unmount and close the encrypted volume:

    ```console
    sudo umount encrypted-storage/
    sudo cryptsetup luksClose secret
    ```

Unplug the volume.

# Clone the system

Connect to Internet:

    ```console
    nmtui
    ```

Install git:

    ```console
    nix-env -i git
    ```

Clone the configuration:

    ```console
    git clone git@guyonvarch.me:/home/git/config /home/joris/code/config
    cd code/config
    git checkout main
    ```

Extract the system’s `hardware-configuration.nix`, and add it to `./hosts/joris/hardware/`.

Move aside the previous configuration:

    ```console
    cp -r /etc/nixos config-old
    sudo rm -rf /etc/nixos
    ```

Link `/etc/nixos` to the configuration:

    ```console
    sudo ln -s /home/joris/code/config /etc/nixos
    ```

Disable automatic export of documents if it’s not the principal system.

Change network interface in `hosts/network/joris/connman.nix`.

Remove `.gnupg/.sshcontrol`

Build:

    ```console
    nixos-rebuild switch
    ```

# Setup user environment

Create user directories:

    ```console
    mkdir code documents downloads music pictures videos
    ```

Create `.less` to setup less keybindings from `.lesskey`:

    ```console
    lesskey
    ```

Setup password store:

    ```console
    git clone git@guyonvarch.me:/home/git/password-store.git .password-store
    ```

Get documents:

    ```console
    duplicity restore rsync://guyonvarch.me/~/backups/documents documents
    ```

# Set up user services

Look at user services:

    ```console
    systemctl --user list-units
    systemctl --user list-timers --all
    ```

If services do not appear, run:

    ```console
    systemctl --user daemon-reload
    ```

# Check hardware acceleration

“OpenGL renderer string” should not be llvm:

    ```console
    nix-shell -p glxinfo --run "glxinfo | grep OpenGL"
    ```

# Synchronize

In order to link a device, use `cobang` to get the link from the QR code.

Then run:

    ```console
    signal-cli addDevice --uri "uri"
    ```

If you get `NotFoundException`, you may have been too slow in the process.