/NixOS-home

Primary LanguageNix

Draft

Pkgs can be found at https://search.nixos.org

sudo nano /etc/nixos/configuration.nix/ to install pkgs

sudo nixos-rebuild --upgrade-all switch to make the package manager rebuild the system with the new changes (and the --upgrade-all to update packages)

nix-shell -p <list of packages> to create ephemeral shells with the packages included in the list. once you exit the shell they no longer exist in the system (A good option if you want to try a program before installing it)

Home-manager

(Notice that most commands should be run with sudo as home-manager interacts with configuration.nix, which is placed at /etc/nixos)

Check the Nixpkgs version being currently followed with:

sudo nix-channel --list

Then try to find a matching release from home-manager, for example, for Nixpkgs version 23.11:

sudo nix-channel --add https://github.com/nix-community/home-manager/archive/release-23.11.tar.gz home-manager
sudo nix-channel --update

Then, if the home-manager is loaded as a NixOS module, check that the configuration.nix has the home.stateVersion specified. e.g:

home-manager.users.${user} = { pkgs, ... }: {

    home.packages = with pkgs; [ vscode ]
    home.stateVersion = "23.11"; 

  };

Once this is done, just nixos-rebuild all over again.

More info at: https://nix-community.github.io/home-manager/index.html#sec-install-nixos-module

Additional stuff:

nix-env --upgrade some-packages
nix-env --rollback

nix-env --list-generations # see all generations
nix-env --unistall firefox # package isn't deleted right away as it might be needed for a rollback
nix-collect-garbage # deletes all packages that aren't in use by any user profile or by a currently running program
sudo nix-collect-garbage -d #remove ALL but current generation (generation = NixOS snapshots basically)

Good vod to have as a reference: https://youtube.com/watch?v=AGVXJ-TKv3Y

How to add second hard drive HDD

(fstab can't be modified)

Check disks and partitions with:

fdisk -l
lsblk

Identify which partition you want to mount and then

mount /dev/sdb2 /home
nixos-generate-config

you will see this:

writing /etc/nixos/hardware-configuration.nix…
warning: not overwriting existing /etc/nixos/configuration.nix

which is expected (as configuration.nix shouldn't be modified by this). you can check if the disk is mounted in boot reading hardware-configuration.nix finish with

sudo nixos-rebuild switch

source: https://discourse.nixos.org/t/how-to-add-second-hard-drive-hdd/6132/1

Other stuff