nix os install

 

curl -L https://nixos.org/nix/install | sh

 bash <(curl -L https://nixos.org/nix/install) --no-daemon

. $HOME/.nix-profile/etc/profile.d/nix.sh

or open new shell

 nix-channel --list

 nixpkgs https://nixos.org/channels/nixpkgs-unstable

upgrade

nix-channel --update; nix-env --install --attr nixpkgs.nix nixpkgs.cacert 

https://status.nixos.org/

https://nixos.wiki/wiki/Nix_channels

https://channels.nixos.org/

  nix-latest/ 

Stable channels (nixos-23.05)

provide conservative updates for fixing bugs and security 
vulnerabilities, but do not receive major updates after initial release.
 New stable channels are released every six months.

unstable channels (nixos-unstable, nixpkgs-unstable) 

correspond to the main development branch (master) of Nixpkgs, delivering the latest 

tested updates on a rolling basis. 

Large channels (nixos-23.05, nixos-unstable) provide binary builds for the full breadth of 

Nixpkgs. 

Small channels (nixos-23.05-small, nixos-unstable-small)
 are identical to large channels, but contain fewer binaries. This means
 they update faster, but require more to be built from source. 

#add channel with test  

nix-channel --add https://nixos.org/channels/nixos-version nixpkgs 

nix-channel --add https://nixos.org/channels/channel-name nixos 

nix-channel --add https://nixos.org/channels/nixos-23.05 nixpkgs 

nix-channel --update 

Install the NixOS installation tools:
 

nix-env -f '<nixpkgs>' -iA nixos-install-tools

export NIX_PATH=/home/kai/.nix-defexpr/channels

 nixos-generate-config and nixos-install, some man pages and nixos-enter available 

these 6 derivations will be built:
  /nix/store/fffnygd90xk1ymy1xd7iw89gbw8sk5jx-builder.pl.drv
  /nix/store/24hw26bp2gvcsfgi4w6p3qgqj9kq5hdz-perl-5.38.0-env.drv
  /nix/store/d21gl4d72fym261s7h5a86mrm9s7zcr6-nixos-enter.drv
  /nix/store/ngr2zbxnal7s36h1nq8glhiymmyqbsh8-nixos-generate-config.drv
  /nix/store/vsicp96ski425gy2ap8q7gfzvgm4f897-nixos-install.drv
  /nix/store/j53xfdr68l70d1srpkzzqqbz0j0a5mhm-nixos-install-tools-23.11pre540796.75a52265bda7.drv
these 163 paths will be fetched (156.97 MiB download, 677.23 MiB unpacked):

Like packages installed via nix-env

nix-env --list-generations

nix-env --install|-i  [args] --prebuilt-only|-b  --attr|-A --preserve-installed|-P --remove-all|-r

sudo mkfs.ext4 -L nixos /dev/nvme0n1p5 

sudo mount /dev/disk/by-label/nixos /mnt

mkdir -p /mnt/boot

mount /dev/disk/by-label/boot /mnt/boot

sudo nixos-generate-config --root /mnt  

writing /mnt/etc/nixos/hardware-configuration.nix...
writing /mnt/etc/nixos/configuration.nix...
For more hardware-specific settings, see https://github.com/NixOS/nixos-hardware.

refer to https://nixos.org/manual/nixos/stable/#sec-installation now 

nano /mnt/etc/nixos/configuration.nix

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

networking.hostName = "kat";                        
networking.wireless.iwd.enable = true; 

time.timeZone = "Asia/Kathmandu";

 i18n.defaultLocale = "en_US.UTF-8";

 

 for single user install

sudo groupadd -g 30000 nixbld

sudo useradd -u 30000 -g nixbld -G nixbld nixbld

sudo PATH="$PATH" NIX_PATH="$NIX_PATH" `which nixos-install` u

PATH="$PATH:/usr/sbin:/sbin

sudo userdel nixbld

sudo groupdel nixbld

sudo rm -rv ~/.nix-* /nix

~/.profile. 

changing nixos config

to build the new configuration, make it the default configuration for booting, and try to realise the configuration in the running system (e.g., by restarting system services).

nixos-rebuild test     

to build the configuration and switch the running system to it, but without making it the boot default. So if (say) the configuration locks up your machine, you can just reboot to get back to a working configuration.

nixos-rebuild boot 

to build the configuration and make it the boot default, but not switch to it now (so it will only take effect after the next reboot).

nixos-rebuild switch -p test

which causes the new configuration (and previous ones created using -p test) to show up in the GRUB submenu “NixOS - Profile ‘test’”. This can be useful to separate test configurations from “stable” configurations.

nixos-rebuild build  

to build the configuration but nothing more. This is useful to see whether everything compiles cleanly. 

 

 

nixos-enter

reinstall bootloader

sudo nixos-rebuild --install-bootloader switch 

 

 

updat pkg 

nix-channel --update nixos

 

 https://nixos.org/manual/nix/stable/command-ref/nix-channel

https://nixos.wiki/wiki/Change_root

mount /dev/relevantPartitionNameHere /mnt

mount -o bind /dev /mnt/dev
mount -o bind /proc /mnt/proc
mount -o bind /sys /mnt/sys
chroot /mnt /nix/var/nix/profiles/system/activate
chroot /mnt /run/current-system/sw/bin/bash

 mount /dev/nvme0n1p5 /mnt/

 mount /dev/nvme0n1p1 /boot/ 

nixos-rebuild --option sandbox false