diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..6de8a8a
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,3 @@
+source_url "https://raw.githubusercontent.com/cachix/devenv/d1f7b48e35e6dee421cfd0f51481d17f77586997/direnvrc" "sha256-YBzqskFZxmNb3kYVoKD9ZixoPXJh1C9ZvTLGFRkauZ0="
+
+use devenv
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c4300bc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+
+# Devenv
+.devenv*
+devenv.local.nix
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml
+
diff --git a/devenv.lock b/devenv.lock
new file mode 100644
index 0000000..96dd4b1
--- /dev/null
+++ b/devenv.lock
@@ -0,0 +1,156 @@
+{
+  "nodes": {
+  "devenv": {
+  "locked": {
+  "dir": "src/modules",
+  "lastModified": 1700140236,
+  "narHash": "sha256-OpukFO0rRG2hJzD+pCQq+nSWuT9dBL6DSvADQaUlmFg=",
+  "owner": "cachix",
+  "repo": "devenv",
+  "rev": "525d60c44de848a6b2dd468f6efddff078eb2af2",
+  "type": "github"
+  },
+  "original": {
+  "dir": "src/modules",
+  "owner": "cachix",
+  "repo": "devenv",
+  "type": "github"
+  }
+  },
+  "flake-compat": {
+  "flake": false,
+  "locked": {
+  "lastModified": 1673956053,
+  "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
+  "owner": "edolstra",
+  "repo": "flake-compat",
+  "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
+  "type": "github"
+  },
+  "original": {
+  "owner": "edolstra",
+  "repo": "flake-compat",
+  "type": "github"
+  }
+  },
+  "flake-utils": {
+  "inputs": {
+  "systems": "systems"
+  },
+  "locked": {
+  "lastModified": 1685518550,
+  "narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
+  "owner": "numtide",
+  "repo": "flake-utils",
+  "rev": "a1720a10a6cfe8234c0e93907ffe81be440f4cef",
+  "type": "github"
+  },
+  "original": {
+  "owner": "numtide",
+  "repo": "flake-utils",
+  "type": "github"
+  }
+  },
+  "gitignore": {
+  "inputs": {
+  "nixpkgs": [
+  "pre-commit-hooks",
+  "nixpkgs"
+  ]
+  },
+  "locked": {
+  "lastModified": 1660459072,
+  "narHash": "sha256-8DFJjXG8zqoONA1vXtgeKXy68KdJL5UaXR8NtVMUbx8=",
+  "owner": "hercules-ci",
+  "repo": "gitignore.nix",
+  "rev": "a20de23b925fd8264fd7fad6454652e142fd7f73",
+  "type": "github"
+  },
+  "original": {
+  "owner": "hercules-ci",
+  "repo": "gitignore.nix",
+  "type": "github"
+  }
+  },
+  "nixpkgs": {
+  "locked": {
+  "lastModified": 1700444282,
+  "narHash": "sha256-s/+tgT+Iz0LZO+nBvSms+xsMqvHt2LqYniG9r+CYyJc=",
+  "owner": "NixOS",
+  "repo": "nixpkgs",
+  "rev": "3f21a22b5aafefa1845dec6f4a378a8f53d8681c",
+  "type": "github"
+  },
+  "original": {
+  "owner": "NixOS",
+  "ref": "nixpkgs-unstable",
+  "repo": "nixpkgs",
+  "type": "github"
+  }
+  },
+  "nixpkgs-stable": {
+  "locked": {
+  "lastModified": 1685801374,
+  "narHash": "sha256-otaSUoFEMM+LjBI1XL/xGB5ao6IwnZOXc47qhIgJe8U=",
+  "owner": "NixOS",
+  "repo": "nixpkgs",
+  "rev": "c37ca420157f4abc31e26f436c1145f8951ff373",
+  "type": "github"
+  },
+  "original": {
+  "owner": "NixOS",
+  "ref": "nixos-23.05",
+  "repo": "nixpkgs",
+  "type": "github"
+  }
+  },
+  "pre-commit-hooks": {
+  "inputs": {
+  "flake-compat": "flake-compat",
+  "flake-utils": "flake-utils",
+  "gitignore": "gitignore",
+  "nixpkgs": [
+  "nixpkgs"
+  ],
+  "nixpkgs-stable": "nixpkgs-stable"
+  },
+  "locked": {
+  "lastModified": 1700064067,
+  "narHash": "sha256-1ZWNDzhu8UlVCK7+DUN9dVQfiHX1bv6OQP9VxstY/gs=",
+  "owner": "cachix",
+  "repo": "pre-commit-hooks.nix",
+  "rev": "e558068cba67b23b4fbc5537173dbb43748a17e8",
+  "type": "github"
+  },
+  "original": {
+  "owner": "cachix",
+  "repo": "pre-commit-hooks.nix",
+  "type": "github"
+  }
+  },
+  "root": {
+  "inputs": {
+  "devenv": "devenv",
+  "nixpkgs": "nixpkgs",
+  "pre-commit-hooks": "pre-commit-hooks"
+  }
+  },
+  "systems": {
+  "locked": {
+  "lastModified": 1681028828,
+  "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+  "owner": "nix-systems",
+  "repo": "default",
+  "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+  "type": "github"
+  },
+  "original": {
+  "owner": "nix-systems",
+  "repo": "default",
+  "type": "github"
+  }
+  }
+  },
+  "root": "root",
+  "version": 7
+  }
diff --git a/devenv.nix b/devenv.nix
new file mode 100644
index 0000000..9abec9b
--- /dev/null
+++ b/devenv.nix
@@ -0,0 +1,7 @@
+{ pkgs, ... }:
+
+{
+  pre-commit.hooks = { nixpkgs-fmt.enable = true; };
+
+  packages = with pkgs; [ nixpkgs-fmt nixfmt ];
+}
diff --git a/devenv.yaml b/devenv.yaml
new file mode 100644
index 0000000..76b7cdf
--- /dev/null
+++ b/devenv.yaml
@@ -0,0 +1,3 @@
+inputs:
+nixpkgs:
+url: github:NixOS/nixpkgs/nixpkgs-unstable
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..99aab77
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,86 @@
+{
+  "nodes": {
+    "disko": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1699781810,
+        "narHash": "sha256-LD+PIUbm1yQmQmGIbSsc/PB1dtJtGqXFgxRc1C7LlfQ=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "2d7d77878c5d70f66f3d676ff66708d8d4f9d7df",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1700419052,
+        "narHash": "sha256-U6a5f9ynbzcp8PMIHULbHPkbwp7YfPKOYmTcLqlalD4=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "993fb02d20760067b8ee19c713d94cee07037759",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nixos-hardware": {
+      "locked": {
+        "lastModified": 1700392353,
+        "narHash": "sha256-KARn8aVJu5fdW0jdJYoOQ1SPqWlNdz4l7r90NbArWSY=",
+        "owner": "NixOS",
+        "repo": "nixos-hardware",
+        "rev": "2b00bc76dc893cd996a3d76a2f059d657a5ef37a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "master",
+        "repo": "nixos-hardware",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1700390070,
+        "narHash": "sha256-de9KYi8rSJpqvBfNwscWdalIJXPo8NjdIZcEJum1mH0=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "e4ad989506ec7d71f7302cc3067abd82730a4beb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "disko": "disko",
+        "home-manager": "home-manager",
+        "nixos-hardware": "nixos-hardware",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..f17049e
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,60 @@
+{
+  description = "NixOS configuration of Thomas Syms";
+  nixConfig = {
+    experimental-features = [ "nix-command" "flakes" ];
+  };
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    home-manager.url = "github:nix-community/home-manager";
+    home-manager.inputs.nixpkgs.follows = "nixpkgs";
+    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
+    disko.url = "github:nix-community/disko";
+    disko.inputs.nixpkgs.follows = "nixpkgs";
+
+  };
+  outputs =
+    inputs@{ self, nixpkgs, home-manager, ... }: {
+      nixosConfigurations = {
+        /* nixos-test = nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          modules = [
+            ./hosts/nixos-test
+            home-manager.nixosModules.home-manager
+            {
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.extraSpecialArgs = inputs;
+              home-manager.users.panotaka = import ./home;
+            }
+          ];
+        };
+        msi-rtx4090 = nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          modules = [
+            ./hosts/msi-rtx4090
+            home-manager.nixosModules.home-manager
+            {
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.extraSpecialArgs = inputs;
+              home-manager.users.panotaka = import ./home;
+            }
+          ];
+        }; */
+        Equinox = nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          specialArgs = { inherit inputs; };
+          modules = [
+            ./hosts/Equinox
+            home-manager.nixosModules.home-manager
+            {
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.extraSpecialArgs = inputs;
+              home-manager.users.panotaka = import ./home;
+            }
+          ];
+        };
+      };
+    };
+}
diff --git a/home/default.nix b/home/default.nix
new file mode 100644
index 0000000..4e0b74a
--- /dev/null
+++ b/home/default.nix
@@ -0,0 +1,28 @@
+{ config, pkgs, ... }:
+
+{
+
+  imports = [
+
+  ];
+
+  # Home Manager needs a bit of information about you and the
+  # paths it should manage.
+  home = {
+    username = "panotaka";
+    homeDirectory = "/home/panotaka";
+
+    # This value determines the Home Manager release that your
+    # configuration is compatible with. This helps avoid breakage
+    # when a new Home Manager release introduces backwards
+    # incompatible changes.
+    #
+    # You can update Home Manager without changing this value. See
+    # the Home Manager release notes for a list of state version
+    # changes in each release.
+    stateVersion = "22.11";
+  };
+
+  # Let Home Manager install and manage itself.
+  programs.home-manager.enable = true;
+}
diff --git a/home/programs/browsers.nix b/home/programs/browsers.nix
new file mode 100644
index 0000000..a2fd0f6
--- /dev/null
+++ b/home/programs/browsers.nix
@@ -0,0 +1,19 @@
+{ pkgs
+, config
+, ...
+}: {
+  programs = {
+    chromium = {
+      enable = true;
+      commandLineArgs = [ "--enable-features=TouchpadOverscrollHistoryNavigation" ];
+      extensions = [
+        # {id = "";}  // extension id, query from chrome web store
+      ];
+    };
+
+    firefox = {
+      enable = true;
+      profiles.ryan = { };
+    };
+  };
+}
diff --git a/home/programs/common.nix b/home/programs/common.nix
new file mode 100644
index 0000000..80ee180
--- /dev/null
+++ b/home/programs/common.nix
@@ -0,0 +1,86 @@
+{ pkgs, ... }: {
+  home.packages = with pkgs; [
+    # archives
+    zip
+    unzip
+    p7zip
+
+    # utils
+    ripgrep
+    yq-go # https://github.com/mikefarah/yq
+    htop
+
+    # misc
+    libnotify
+    wineWowPackages.wayland
+    xdg-utils
+    graphviz
+
+    # productivity
+    obsidian
+
+    # IDE
+    insomnia
+
+    # cloud native
+    docker-compose
+    kubectl
+
+
+    nodejs
+    nodePackages.npm
+    nodePackages.pnpm
+    yarn
+
+    # db related
+    dbeaver
+    mycli
+    pgcli
+  ];
+
+  programs = {
+    tmux = {
+      enable = true;
+      clock24 = true;
+      keyMode = "vi";
+      extraConfig = "mouse on";
+    };
+
+    bat = {
+      enable = true;
+      config = {
+        pager = "less -FR";
+        theme = "Catppuccin-mocha";
+      };
+      themes = {
+        Catppuccin-mocha = builtins.readFile (pkgs.fetchurl {
+          url = "https://raw.githubusercontent.com/catppuccin/bat/main/Catppuccin-mocha.tmTheme";
+          hash = "sha256-qMQNJGZImmjrqzy7IiEkY5IhvPAMZpq0W6skLLsng/w=";
+        });
+      };
+    };
+
+    btop.enable = true; # replacement of htop/nmon
+    exa.enable = true; # A modern replacement for ‘ls’
+    jq.enable = true; # A lightweight and flexible command-line JSON processor
+    ssh.enable = true;
+    aria2.enable = true;
+
+    skim = {
+      enable = true;
+      enableZshIntegration = true;
+      defaultCommand = "rg --files --hidden";
+      changeDirWidgetOptions = [
+        "--preview 'exa --icons --git --color always -T -L 3 {} | head -200'"
+        "--exact"
+      ];
+    };
+  };
+
+  services = {
+    syncthing.enable = true;
+
+    # auto mount usb drives
+    udiskie.enable = true;
+  };
+}
diff --git a/home/programs/default.nix b/home/programs/default.nix
new file mode 100644
index 0000000..fae9a82
--- /dev/null
+++ b/home/programs/default.nix
@@ -0,0 +1,13 @@
+{ config
+, pkgs
+, ...
+}: {
+  imports = [
+    ./browsers.nix
+    ./common.nix
+    ./git.nix
+    ./media.nix
+    ./vscode.nix
+    ./xdg.nix
+  ];
+}
diff --git a/home/programs/git.nix b/home/programs/git.nix
new file mode 100644
index 0000000..66cb9d4
--- /dev/null
+++ b/home/programs/git.nix
@@ -0,0 +1,12 @@
+{ pkgs
+, ...
+}: {
+  home.packages = [ pkgs.gh ];
+
+  programs.git = {
+    enable = true;
+
+    userName = "Ryan Yin";
+    userEmail = "xiaoyin_c@qq.com";
+  };
+}
diff --git a/home/programs/media.nix b/home/programs/media.nix
new file mode 100644
index 0000000..5cd2140
--- /dev/null
+++ b/home/programs/media.nix
@@ -0,0 +1,32 @@
+{ pkgs
+, config
+, ...
+}:
+# media - control and enjoy audio/video
+{
+  # imports = [
+  # ];
+
+  home.packages = with pkgs; [
+    # audio control
+    pavucontrol
+    playerctl
+    pulsemixer
+    # images
+    imv
+  ];
+
+  programs = {
+    mpv = {
+      enable = true;
+      defaultProfiles = [ "gpu-hq" ];
+      scripts = [ pkgs.mpvScripts.mpris ];
+    };
+
+    obs-studio.enable = true;
+  };
+
+  services = {
+    playerctld.enable = true;
+  };
+}
diff --git a/home/programs/vscode.nix b/home/programs/vscode.nix
new file mode 100644
index 0000000..80529d8
--- /dev/null
+++ b/home/programs/vscode.nix
@@ -0,0 +1,125 @@
+{ config
+, pkgs
+, home-manager
+, nix-vscode-extensions
+, ...
+}:
+
+{
+
+  # if use vscode in wayland, uncomment this line
+  # environment.sessionVariables.NIXOS_OZONE_WL = "1";
+  programs.vscode = {
+    enable = true;
+    userSettings = {
+      "editor.renderWhitespace" = "all";
+      "files.autoSave" = "onFocusChange";
+      "editor.rulers" = [ 80 120 ];
+      "telemetry.enableTelemetry" = false;
+      "telemetry.enableCrashReporter" = false;
+      "editor.tabSize" = 2;
+      "files.exclude" = { "**/node_modules/**" = true; };
+      "editor.formatOnSave" = false;
+      "breadcrumbs.enabled" = true;
+      "editor.useTabStops" = false;
+      "editor.fontFamily" = "JetBrainsMono Nerd Font";
+      "editor.fontSize" = 16;
+      "editor.fontLigatures" = true;
+      "editor.lineHeight" = 20;
+      "workbench.fontAliasing" = "antialiased";
+      "files.trimTrailingWhitespace" = true;
+      "editor.minimap.enabled" = false;
+      "workbench.editor.enablePreview" = false;
+      "terminal.integrated.fontFamily" = "JetBrainsMono Nerd Font";
+    };
+
+    package =
+      let
+        config.packageOverrides = pkgs: {
+          vscode = pkgs.vscode-with-extensions.override {
+            # pkgs.vscode-extensions 里包含的 vscode 太少了
+            # 必须使用社区的 <https://github.com/nix-community/nix-vscode-extensions> 才能安装更多插件
+            vscodeExtensions = with nix-vscode-extensions.extensions; [
+              aaron-bond.better-comments
+              anweber.vscode-httpyac
+              arrterian.nix-env-selector
+              bierner.markdown-mermaid
+              christian-kohler.path-intellisense
+              cschlosser.doxdocgen
+              DanishSarwar.reverse-search
+              eamodio.gitlens
+              esbenp.prettier-vscode
+              espressif.esp-idf-extension
+              fabiospampinato.vscode-diff
+              GitHub.copilot
+              golang.go
+              hashicorp.terraform
+              janisdd.vscode-edit-csv
+              jebbs.plantuml
+              jeff-hykin.better-cpp-syntax
+              jnoortheen.nix-ide
+              JuanBlanco.solidity
+              k--kato.intellij-idea-keybindings
+              llvm-vs-code-extensions.vscode-clangd
+              mcu-debug.debug-tracker-vscode
+              mcu-debug.memory-view
+              mcu-debug.rtos-views
+              mikestead.dotenv
+              mkhl.direnv
+              ms-azuretools.vscode-docker
+              ms-dotnettools.vscode-dotnet-runtime
+              ms-kubernetes-tools.vscode-kubernetes-tools
+              ms-python.isort
+              ms-python.python
+              ms-python.vscode-pylance
+              ms-toolsai.jupyter
+              ms-toolsai.jupyter-keymap
+              ms-toolsai.jupyter-renderers
+              ms-toolsai.vscode-jupyter-cell-tags
+              ms-toolsai.vscode-jupyter-slideshow
+              ms-vscode-remote.remote-containers
+              ms-vscode-remote.remote-ssh
+              ms-vscode-remote.remote-ssh-edit
+              ms-vscode-remote.vscode-remote-extensionpack
+              ms-vscode.cmake-tools
+              ms-vscode.cpptools
+              ms-vscode.cpptools-extension-pack
+              ms-vscode.cpptools-themes
+              ms-vscode.remote-explorer
+              ms-vscode.remote-server
+              pinage404.nix-extension-pack
+              platformio.platformio-ide
+              pomdtr.excalidraw-editor
+              redhat.java
+              redhat.vscode-commons
+              redhat.vscode-xml
+              redhat.vscode-yaml
+              rust-lang.rust-analyzer
+              shd101wyy.markdown-preview-enhanced
+              sumneko.lua
+              tamasfe.even-better-toml
+              timonwong.shellcheck
+              tintinweb.graphviz-interactive-preview
+              tintinweb.solidity-visual-auditor
+              tintinweb.vscode-inline-bookmarks
+              tintinweb.vscode-solidity-flattener
+              tintinweb.vscode-solidity-language
+              twxs.cmake
+              vadimcn.vscode-lldb
+              VisualStudioExptTeam.intellicode-api-usage-examples
+              VisualStudioExptTeam.vscodeintellicode
+              vscjava.vscode-java-debug
+              vscjava.vscode-java-pack
+              vscjava.vscode-java-test
+              vscjava.vscode-maven
+              vscode-icons-team.vscode-icons
+              WakaTime.vscode-wakatime
+              yzhang.markdown-all-in-one
+              zxh404.vscode-proto3
+            ];
+          };
+        };
+      in
+      pkgs.vscode;
+  };
+}
diff --git a/home/programs/xdg.nix b/home/programs/xdg.nix
new file mode 100644
index 0000000..d5851b1
--- /dev/null
+++ b/home/programs/xdg.nix
@@ -0,0 +1,49 @@
+{ config, ... }:
+let
+  browser = [ "firefox.desktop" ];
+
+  # XDG MIME types
+  associations = {
+    "application/x-extension-htm" = browser;
+    "application/x-extension-html" = browser;
+    "application/x-extension-shtml" = browser;
+    "application/x-extension-xht" = browser;
+    "application/x-extension-xhtml" = browser;
+    "application/xhtml+xml" = browser;
+    "text/html" = browser;
+    "x-scheme-handler/about" = browser;
+    "x-scheme-handler/chrome" = [ "chromium-browser.desktop" ];
+    "x-scheme-handler/ftp" = browser;
+    "x-scheme-handler/http" = browser;
+    "x-scheme-handler/https" = browser;
+    "x-scheme-handler/unknown" = browser;
+
+    "audio/*" = [ "mpv.desktop" ];
+    "video/*" = [ "mpv.dekstop" ];
+    "image/*" = [ "imv.desktop" ];
+    "application/json" = browser;
+    "application/pdf" = [ "org.pwmt.zathura.desktop.desktop" ];
+    "x-scheme-handler/discord" = [ "discordcanary.desktop" ];
+    "x-scheme-handler/spotify" = [ "spotify.desktop" ];
+    "x-scheme-handler/tg" = [ "telegramdesktop.desktop" ];
+  };
+in
+{
+  xdg = {
+    enable = true;
+    cacheHome = config.home.homeDirectory + "/.local/cache";
+
+    mimeApps = {
+      enable = true;
+      defaultApplications = associations;
+    };
+
+    userDirs = {
+      enable = true;
+      createDirectories = true;
+      extraConfig = {
+        XDG_SCREENSHOTS_DIR = "${config.xdg.userDirs.pictures}/Screenshots";
+      };
+    };
+  };
+}
diff --git a/home/shell/common.nix b/home/shell/common.nix
new file mode 100644
index 0000000..a2d1604
--- /dev/null
+++ b/home/shell/common.nix
@@ -0,0 +1,17 @@
+{ pkgs
+, ...
+}:
+# nix tooling
+{
+  home.packages = with pkgs; [
+    alejandra
+    deadnix
+    statix
+  ];
+
+  programs.direnv = {
+    enable = true;
+    nix-direnv.enable = true;
+    enableZshIntegration = true;
+  };
+}
diff --git a/home/shell/default.nix b/home/shell/default.nix
new file mode 100644
index 0000000..2be3b3e
--- /dev/null
+++ b/home/shell/default.nix
@@ -0,0 +1,36 @@
+{ config, ... }:
+let
+  d = config.xdg.dataHome;
+  c = config.xdg.configHome;
+  cache = config.xdg.cacheHome;
+in
+{
+  imports = [
+    ./nushell
+    ./common.nix
+    ./starship.nix
+    ./terminals.nix
+  ];
+
+  # add environment variables
+  home.sessionVariables = {
+    # clean up ~
+    LESSHISTFILE = cache + "/less/history";
+    LESSKEY = c + "/less/lesskey";
+    WINEPREFIX = d + "/wine";
+
+    # set default applications
+    EDITOR = "vim";
+    BROWSER = "firefox";
+    TERMINAL = "alacritty";
+
+    # enable scrolling in git diff
+    DELTA_PAGER = "less -R";
+
+    MANPAGER = "sh -c 'col -bx | bat -l man -p'";
+  };
+
+  home.shellAliases = {
+    k = "kubectl";
+  };
+}
diff --git a/home/shell/nushell/config.nu b/home/shell/nushell/config.nu
new file mode 100644
index 0000000..e69de29
diff --git a/home/shell/nushell/default.nix b/home/shell/nushell/default.nix
new file mode 100644
index 0000000..9165426
--- /dev/null
+++ b/home/shell/nushell/default.nix
@@ -0,0 +1,7 @@
+{
+  programs.nushell = {
+    enable = true;
+    configFile.source = ./config.nu;
+    envFile.source = ./env.nu;
+  };
+}
diff --git a/home/shell/nushell/env.nu b/home/shell/nushell/env.nu
new file mode 100644
index 0000000..5804d34
--- /dev/null
+++ b/home/shell/nushell/env.nu
@@ -0,0 +1,36 @@
+# Nushell Environment Config File
+
+# Specifies how environment variables are:
+# - converted from a string to a value on Nushell startup (from_string)
+# - converted from a value back to a string when running external commands (to_string)
+# Note: The conversions happen *after* config.nu is loaded
+let-env ENV_CONVERSIONS = {
+  "PATH": {
+    from_string: { |s| $s | split row (char esep) | path expand -n }
+    to_string: { |v| $v | path expand -n | str join (char esep) }
+  }
+  "Path": {
+    from_string: { |s| $s | split row (char esep) | path expand -n }
+    to_string: { |v| $v | path expand -n | str join (char esep) }
+  }
+}
+
+# Directories to search for scripts when calling source or use
+#
+# By default, <nushell-config-dir>/scripts is added
+let-env NU_LIB_DIRS = [
+    ($nu.config-path | path dirname | path join 'scripts')
+]
+
+# Directories to search for plugin binaries when calling register
+#
+# By default, <nushell-config-dir>/plugins is added
+let-env NU_PLUGIN_DIRS = [
+    ($nu.config-path | path dirname | path join 'plugins')
+]
+
+# To add entries to PATH (on Windows you might use Path), you can use the following pattern:
+# let-env PATH = ($env.PATH | split row (char esep) | prepend '/some/path')
+
+mkdir ~/.cache/starship
+starship init nu | sed "s/size -c/size/" | save ~/.cache/starship/init.nu
\ No newline at end of file
diff --git a/home/shell/starship.nix b/home/shell/starship.nix
new file mode 100644
index 0000000..afea194
--- /dev/null
+++ b/home/shell/starship.nix
@@ -0,0 +1,13 @@
+{ config, ... }: {
+  home.sessionVariables.STARSHIP_CACHE = "${config.xdg.cacheHome}/starship";
+
+  programs.starship = {
+    enable = true;
+    settings = {
+      character = {
+        success_symbol = "[›](bold green)";
+        error_symbol = "[›](bold red)";
+      };
+    };
+  };
+}
diff --git a/home/shell/terminals.nix b/home/shell/terminals.nix
new file mode 100644
index 0000000..6b2c9fb
--- /dev/null
+++ b/home/shell/terminals.nix
@@ -0,0 +1,29 @@
+{ pkgs, ... }:
+
+# terminals
+
+let
+  font = "JetBrainsMono Nerd Font";
+in
+{
+  programs.alacritty = {
+    enable = true;
+    settings = {
+      window.opacity = 0.95;
+      window.dynamic_padding = true;
+      window.padding = {
+        x = 5;
+        y = 5;
+      };
+      scrolling.history = 10000;
+
+      font = {
+        normal.family = font;
+        bold.family = font;
+        italic.family = font;
+        size = 11;
+      };
+
+    };
+  };
+}
diff --git a/hosts/Equinox/default.nix b/hosts/Equinox/default.nix
new file mode 100644
index 0000000..cb25c59
--- /dev/null
+++ b/hosts/Equinox/default.nix
@@ -0,0 +1,58 @@
+{ config, pkgs, inputs, ... }:
+
+let
+  hostname = "Equinox";
+in
+{
+  # Allow unfree packages
+  nixpkgs.config.allowUnfree = true;
+
+
+  # System version
+  system.stateVersion = "22.11";
+
+
+  # Import hardware configuration
+  imports = [
+    ../../modules/system.nix
+
+
+    inputs.nixos-hardware.nixosModules.dell-xps-15-9510
+    inputs.nixos-hardware.nixosModules.dell-xps-15-9510-nvidia
+    inputs.disko.nixosModules.disko
+    ./disko.nix
+  ];
+
+
+  # Set hostname and timezone
+  networking.hostName = hostname;
+
+
+  # Bootloader configuration
+  boot = {
+    kernelModules = [ "kvm-intel" ];
+    extraModulePackages = [ ];
+
+    initrd = {
+      kernelModules = [ ];
+      availableKernelModules = [
+        "xhci_pci"
+        "thunderbolt"
+        "vmd"
+        "nvme"
+        "usb_storage"
+        "sd_mod"
+        "rtsx_pci_sdmmc"
+      ];
+    };
+
+    loader = {
+      systemd-boot.enable = true;
+      efi = {
+        canTouchEfiVariables = true;
+      };
+    };
+  };
+
+
+}
diff --git a/hosts/Equinox/disko.nix b/hosts/Equinox/disko.nix
new file mode 100644
index 0000000..832018e
--- /dev/null
+++ b/hosts/Equinox/disko.nix
@@ -0,0 +1,59 @@
+{
+  disko.devices = {
+    disk = {
+      nvme0n1 = {
+        type = "disk";
+        device = "/dev/vda";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [
+                  "defaults"
+                ];
+              };
+            };
+            luks = {
+              size = "100%";
+              content = {
+                type = "luks";
+                name = "crypted";
+                settings = {
+                  allowDiscards = true;
+                };
+                content = {
+                  type = "btrfs";
+                  extraArgs = [ "-f" ];
+                  subvolumes = {
+                    "/root" = {
+                      mountpoint = "/";
+                      mountOptions = [ "compress=zstd" "noatime" ];
+                    };
+                    "/home" = {
+                      mountpoint = "/home";
+                      mountOptions = [ "compress=zstd" "noatime" ];
+                    };
+                    "/nix" = {
+                      mountpoint = "/nix";
+                      mountOptions = [ "compress=zstd" "noatime" ];
+                    };
+                    "/swap" = {
+                      mountpoint = "/.swapvol";
+                      swap.swapfile.size = "40G";
+                    };
+                  };
+                };
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}
diff --git a/hosts/msi-rtx4090/default.nix b/hosts/msi-rtx4090/default.nix
new file mode 100644
index 0000000..6bd5428
--- /dev/null
+++ b/hosts/msi-rtx4090/default.nix
@@ -0,0 +1,55 @@
+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/system.nix
+      ../../modules/i3.nix
+
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+  # Bootloader.
+  boot.loader = {
+    efi = {
+      canTouchEfiVariables = true;
+      efiSysMountPoint = "/boot/efi"; # ← use the same mount point here.
+    };
+    systemd-boot.enable = true;
+  };
+
+  networking.hostName = "msi-rtx4090"; # Define your hostname.
+  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
+
+  # Configure network proxy if necessary
+  # networking.proxy.default = "http://user:password@proxy:port/";
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+
+  # Enable networking
+  networking.networkmanager.enable = true;
+  networking.defaultGateway = "192.168.5.201";
+
+  # for Nvidia GPU
+  services.xserver.videoDrivers = [ "nvidia" ];
+  hardware.opengl.enable = true;
+  hardware.nvidia = {
+    package = config.boot.kernelPackages.nvidiaPackages.stable;
+    modesetting.enable = true;
+  };
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "22.11"; # Did you read the comment?
+
+}
+
+
diff --git a/hosts/msi-rtx4090/hardware-configuration.nix b/hosts/msi-rtx4090/hardware-configuration.nix
new file mode 100644
index 0000000..c1c82c3
--- /dev/null
+++ b/hosts/msi-rtx4090/hardware-configuration.nix
@@ -0,0 +1,43 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [
+      (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "uas" "usb_storage" "sd_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    {
+      device = "/dev/disk/by-uuid/9730ef67-577c-4dc9-8563-f431c1cf25fb";
+      fsType = "ext4";
+    };
+
+  fileSystems."/boot/efi" =
+    {
+      device = "/dev/disk/by-uuid/8DA9-86FF";
+      fsType = "vfat";
+    };
+
+  swapDevices =
+    [{ device = "/dev/disk/by-uuid/5364261a-3ecc-4754-b114-ff44c529627e"; }];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp5s0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.wlo1.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}
diff --git a/hosts/nixos-test/default.nix b/hosts/nixos-test/default.nix
new file mode 100644
index 0000000..ff677d7
--- /dev/null
+++ b/hosts/nixos-test/default.nix
@@ -0,0 +1,53 @@
+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/system.nix
+      ../../modules/i3.nix
+
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+  # Bootloader.
+  boot.loader = {
+    # efi = {
+    #   canTouchEfiVariables = true;
+    #   efiSysMountPoint = "/boot/efi"; # ← use the same mount point here.
+    # };
+    grub = {
+      enable = true;
+      device = "/dev/sda"; #  "nodev"
+      efiSupport = false;
+      useOSProber = true;
+      #efiInstallAsRemovable = true; # in case canTouchEfiVariables doesn't work for your system
+    };
+  };
+
+  networking.hostName = "nixos-test"; # Define your hostname.
+  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
+
+  # Configure network proxy if necessary
+  # networking.proxy.default = "http://user:password@proxy:port/";
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+
+  # Enable networking
+  networking.networkmanager.enable = true;
+  networking.defaultGateway = "192.168.5.201";
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "22.11"; # Did you read the comment?
+
+}
+
+
diff --git a/hosts/nixos-test/hardware-configuration.nix b/hosts/nixos-test/hardware-configuration.nix
new file mode 100644
index 0000000..a53d800
--- /dev/null
+++ b/hosts/nixos-test/hardware-configuration.nix
@@ -0,0 +1,34 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [
+      (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    {
+      device = "/dev/disk/by-uuid/b779eb19-e43d-4f07-a91f-eb08bd8e1202";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.ens18.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}
diff --git a/modules/i3.nix b/modules/i3.nix
new file mode 100644
index 0000000..a6cbfa1
--- /dev/null
+++ b/modules/i3.nix
@@ -0,0 +1,55 @@
+{ pkgs, ... }:
+
+
+{
+
+  # i3 related options
+  environment.pathsToLink = [ "/libexec" ]; # links /libexec from derivations to /run/current-system/sw
+  services.xserver = {
+    enable = true;
+
+    desktopManager = {
+      xterm.enable = false;
+    };
+
+    displayManager = {
+      defaultSession = "none+i3";
+      lightdm.enable = false;
+      gdm.enable = true;
+    };
+
+    windowManager.i3 = {
+      enable = true;
+      extraPackages = with pkgs; [
+        rofi # application launcher, the same as dmenu
+        dunst # notification daemon
+        i3blocks # status bar
+        i3lock # default i3 screen locker
+        xautolock # lock screen after some time
+        i3status # provide information to i3bar
+        i3-gaps # i3 with gaps
+        picom # transparency and shadows
+        feh # set wallpaper
+        acpi # battery information
+        arandr # screen layout manager
+        dex # autostart applications
+        xbindkeys # bind keys to commands
+        xorg.xbacklight # control screen brightness
+        xorg.xdpyinfo # get screen information
+        sysstat # get system information
+      ];
+    };
+
+    # Configure keymap in X11
+    layout = "us";
+    xkbVariant = "";
+  };
+
+  # thunar file manager(part of xfce) related options
+  programs.thunar.plugins = with pkgs.xfce; [
+    thunar-archive-plugin
+    thunar-volman
+  ];
+  services.gvfs.enable = true; # Mount, trash, and other functionalities
+  services.tumbler.enable = true; # Thumbnail support for images
+}
diff --git a/modules/system.nix b/modules/system.nix
new file mode 100644
index 0000000..d918273
--- /dev/null
+++ b/modules/system.nix
@@ -0,0 +1,130 @@
+{ config, pkgs, ... }:
+
+{
+  # Set your time zone.
+  time.timeZone = "Asia/Shanghai";
+
+  # Select internationalisation properties.
+  i18n.defaultLocale = "en_US.UTF-8";
+
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "zh_CN.UTF-8";
+    LC_IDENTIFICATION = "zh_CN.UTF-8";
+    LC_MEASUREMENT = "zh_CN.UTF-8";
+    LC_MONETARY = "zh_CN.UTF-8";
+    LC_NAME = "zh_CN.UTF-8";
+    LC_NUMERIC = "zh_CN.UTF-8";
+    LC_PAPER = "zh_CN.UTF-8";
+    LC_TELEPHONE = "zh_CN.UTF-8";
+    LC_TIME = "zh_CN.UTF-8";
+  };
+
+  # Enable CUPS to print documents.
+  services.printing.enable = true;
+
+
+  fonts = {
+    fonts = with pkgs; [
+      # icon fonts
+      material-design-icons
+
+      # normal fonts
+      noto-fonts
+      noto-fonts-cjk
+      noto-fonts-emoji
+
+      # nerdfonts
+      (nerdfonts.override { fonts = [ "FiraCode" "JetBrainsMono" ]; })
+    ];
+
+    # use fonts specified by user rather than default ones
+    enableDefaultFonts = false;
+
+    # user defined fonts
+    # the reason there's Noto Color Emoji everywhere is to override DejaVu's
+    # B&W emojis that would sometimes show instead of some Color emojis
+    fontconfig.defaultFonts = {
+      serif = [ "Noto Serif" "Noto Color Emoji" ];
+      sansSerif = [ "Noto Sans" "Noto Color Emoji" ];
+      monospace = [ "JetBrainsMono Nerd Font" "Noto Color Emoji" ];
+      emoji = [ "Noto Color Emoji" ];
+    };
+  };
+
+  programs.dconf.enable = true;
+
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  networking.firewall.enable = false;
+
+  # Enable the OpenSSH daemon.
+  services.openssh = {
+    enable = true;
+    settings = {
+      X11Forwarding = true;
+      PermitRootLogin = "no"; # disable root login
+      PasswordAuthentication = false; # disable password login
+    };
+    openFirewall = true;
+  };
+
+  # Allow unfree packages
+  nixpkgs.config.allowUnfree = true;
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  environment.systemPackages = with pkgs; [
+    vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
+    wget
+    curl
+    git
+    sysstat
+    lm_sensors # for `sensors` command
+    # minimal screen capture tool, used by i3 blur lock to take a screenshot
+    # print screen key is also bound to this tool in i3 config
+    scrot
+    neofetch
+    xfce.thunar # xfce4's file manager
+    nnn # terminal file manager
+  ];
+
+  # Enable sound with pipewire.
+  sound.enable = true;
+  hardware.pulseaudio.enable = false;
+  services.power-profiles-daemon = {
+    enable = true;
+  };
+  security.polkit.enable = true;
+
+  services = {
+    dbus.packages = [ pkgs.gcr ];
+
+    geoclue2.enable = true;
+
+    pipewire = {
+      enable = true;
+      alsa.enable = true;
+      alsa.support32Bit = true;
+      pulse.enable = true;
+      # If you want to use JACK applications, uncomment this
+      jack.enable = true;
+
+      # use the example session manager (no others are packaged yet so this is enabled by default,
+      # no need to redefine it in your config for now)
+      #media-session.enable = true;
+    };
+
+    udev.packages = with pkgs; [ gnome.gnome-settings-daemon ];
+  };
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.panotaka = {
+    isNormalUser = true;
+    description = "panotaka";
+    extraGroups = [ "networkmanager" "wheel" ];
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJx3Sk20pLL1b2PPKZey2oTyioODrErq83xG78YpFBoj admin@ryan-MBP"
+    ];
+  };
+}
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