docs: tidy

README.md

@@ -1,21 +1 @@
-# Nix configs
-
-## NixOS
-
-```sh
-nixos-rebuild switch --flake .#<hostname>
-```
-
-## Home Manager
-
-Bootstrap:
-
-```sh
-nix run nixpkgs#home-manager -- switch --flake .
-```
-
-Normal:
-
-```sh
-home-manager switch --flake .
-```
+# dotfiles [![CI](https://github.com/DanNixon/dotfiles/actions/workflows/ci.yml/badge.svg)](https://github.com/DanNixon/dotfiles/actions/workflows/ci.yml)

cheatsheet.md

@@ -0,0 +1,26 @@
+# Cheat Sheet
+
+## NixOS
+
+- Update now: `nixos-rebuild switch --flake .`
+- Update on boot: `nixos-rebuild boot --flake .`
+
+## Home Manager
+
+- Bootstrap: `nix run nixpkgs#home-manager -- switch --flake .`
+- Update: `home-manager switch --flake .`
+
+## Managing NixOS generations
+
+- List: `nix-env --profile /nix/var/nix/profiles/system --list-generations`
+- Remove specific: `nix-env --profile /nix/var/nix/profiles/system --delete-generations N ...`
+
+## Managing Home Manager generations
+
+- List: `home-manager generations`
+- Remove specific: `home-manager remove-generations N ...`
+- Remove old: `home-manager expire-generations "-7days"`
+
+## Store
+
+- Garbage collect: `nix store gc`