diff --git a/kiauh/core/base_extension.py b/kiauh/core/base_extension.py
new file mode 100644
index 0000000..09245ee
--- /dev/null
+++ b/kiauh/core/base_extension.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+
+# ======================================================================= #
+#  Copyright (C) 2020 - 2024 Dominik Willner <th33xitus@gmail.com>        #
+#                                                                         #
+#  This file is part of KIAUH - Klipper Installation And Update Helper    #
+#  https://github.com/dw-0/kiauh                                          #
+#                                                                         #
+#  This file may be distributed under the terms of the GNU GPLv3 license  #
+# ======================================================================= #
+
+from abc import abstractmethod, ABC
+from typing import Dict
+
+
+# noinspection PyUnusedLocal
+# noinspection PyMethodMayBeStatic
+class BaseExtension(ABC):
+    def __init__(self, metadata: Dict[str, str]):
+        self.metadata = metadata
+
+    @abstractmethod
+    def install_extension(self, **kwargs) -> None:
+        raise NotImplementedError(
+            "Subclasses must implement the install_extension method"
+        )
+
+    @abstractmethod
+    def remove_extension(self, **kwargs) -> None:
+        raise NotImplementedError(
+            "Subclasses must implement the remove_extension method"
+        )
diff --git a/kiauh/core/menus/extensions_menu.py b/kiauh/core/menus/extensions_menu.py
new file mode 100644
index 0000000..ebbc4c5
--- /dev/null
+++ b/kiauh/core/menus/extensions_menu.py
@@ -0,0 +1,135 @@
+#!/usr/bin/env python3
+
+# ======================================================================= #
+#  Copyright (C) 2020 - 2024 Dominik Willner <th33xitus@gmail.com>        #
+#                                                                         #
+#  This file is part of KIAUH - Klipper Installation And Update Helper    #
+#  https://github.com/dw-0/kiauh                                          #
+#                                                                         #
+#  This file may be distributed under the terms of the GNU GPLv3 license  #
+# ======================================================================= #
+
+import json
+import textwrap
+import importlib
+import inspect
+from pathlib import Path
+from typing import List, Dict
+
+from kiauh.core.base_extension import BaseExtension
+from kiauh.core.menus import BACK_FOOTER
+from kiauh.core.menus.base_menu import BaseMenu
+from kiauh.utils.constants import RESET_FORMAT, COLOR_CYAN, COLOR_YELLOW
+
+
+# noinspection PyUnusedLocal
+# noinspection PyMethodMayBeStatic
+class ExtensionsMenu(BaseMenu):
+    def __init__(self):
+        self.extensions = self.discover_extensions()
+        super().__init__(
+            header=True,
+            options=self.get_options(),
+            footer_type=BACK_FOOTER,
+        )
+
+    def discover_extensions(self) -> List[BaseExtension]:
+        extensions = []
+        extensions_dir = Path(__file__).resolve().parents[2].joinpath("extensions")
+
+        for extension in extensions_dir.iterdir():
+            metadata_json = Path(extension).joinpath("metadata.json")
+            if not metadata_json.exists():
+                continue
+
+            try:
+                with open(metadata_json, "r") as m:
+                    metadata = json.load(m).get("metadata")
+                    module_name = (
+                        f"kiauh.extensions.{extension.name}.{metadata.get('module')}"
+                    )
+                    name, extension = inspect.getmembers(
+                        importlib.import_module(module_name),
+                        predicate=lambda o: inspect.isclass(o)
+                        and issubclass(o, BaseExtension)
+                        and o != BaseExtension,
+                    )[0]
+                    extensions.append(extension(metadata))
+            except (IOError, json.JSONDecodeError, ImportError) as e:
+                print(f"Failed loading extension {extension}: {e}")
+
+        return sorted(extensions, key=lambda ex: ex.metadata.get("index"))
+
+    def get_options(self) -> Dict[str, BaseMenu]:
+        options = {}
+        for extension in self.extensions:
+            index = extension.metadata.get("index")
+            options[f"{index}"] = ExtensionSubmenu(extension)
+
+        return options
+
+    def print_menu(self):
+        header = " [ Extensions Menu ] "
+        color = COLOR_CYAN
+        line1 = f"{COLOR_YELLOW}Available Extensions:{RESET_FORMAT}"
+        count = 62 - len(color) - len(RESET_FORMAT)
+        menu = textwrap.dedent(
+            f"""
+            /=======================================================\\
+            | {color}{header:~^{count}}{RESET_FORMAT} |
+            |-------------------------------------------------------|
+            | {line1:<62} |
+            |                                                       |
+            """
+        )[1:]
+        print(menu, end="")
+
+        for extension in self.extensions:
+            index = extension.metadata.get("index")
+            name = extension.metadata.get("display_name")
+            row = f"{index}) {name}"
+            print(f"| {row:<53} |")
+
+
+# noinspection PyUnusedLocal
+# noinspection PyMethodMayBeStatic
+class ExtensionSubmenu(BaseMenu):
+    def __init__(self, extension: BaseExtension):
+        self.extension = extension
+        self.extension_name = extension.metadata.get("display_name")
+        self.extension_desc = extension.metadata.get("description")
+        super().__init__(
+            header=False,
+            options={
+                "1": extension.install_extension,
+                "2": extension.remove_extension,
+            },
+            footer_type=BACK_FOOTER,
+        )
+
+    def print_menu(self) -> None:
+        header = f" [ {self.extension_name} ] "
+        color = COLOR_YELLOW
+        count = 62 - len(color) - len(RESET_FORMAT)
+
+        wrapper = textwrap.TextWrapper(55, initial_indent="| ", subsequent_indent="| ")
+        lines = wrapper.wrap(self.extension_desc)
+        formatted_lines = [f"{line:<55} |" for line in lines]
+        description_text = "\n".join(formatted_lines)
+
+        menu = textwrap.dedent(
+            f"""
+            /=======================================================\\
+            | {color}{header:~^{count}}{RESET_FORMAT} |
+            |-------------------------------------------------------|
+            """
+        )[1:]
+        menu += f"{description_text}\n"
+        menu += textwrap.dedent(
+            """
+            |-------------------------------------------------------|
+            | 1) Install                                            |
+            | 2) Remove                                             |
+            """
+        )[1:]
+        print(menu, end="")
diff --git a/kiauh/core/menus/main_menu.py b/kiauh/core/menus/main_menu.py
index aa59d79..366b99a 100644
--- a/kiauh/core/menus/main_menu.py
+++ b/kiauh/core/menus/main_menu.py
@@ -14,6 +14,7 @@ import textwrap
 from kiauh.core.menus import QUIT_FOOTER
 from kiauh.core.menus.advanced_menu import AdvancedMenu
 from kiauh.core.menus.base_menu import BaseMenu
+from kiauh.core.menus.extensions_menu import ExtensionsMenu
 from kiauh.core.menus.install_menu import InstallMenu
 from kiauh.core.menus.remove_menu import RemoveMenu
 from kiauh.core.menus.settings_menu import SettingsMenu
@@ -43,7 +44,7 @@ class MainMenu(BaseMenu):
                 "3": RemoveMenu,
                 "4": AdvancedMenu,
                 "5": None,
-                "e": None,
+                "e": ExtensionsMenu,
                 "s": SettingsMenu,
             },
             footer_type=QUIT_FOOTER,
diff --git a/kiauh/extensions/__init__.py b/kiauh/extensions/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/kiauh/extensions/gcode_shell_cmd/__init__.py b/kiauh/extensions/gcode_shell_cmd/__init__.py
new file mode 100644
index 0000000..c0d921b
--- /dev/null
+++ b/kiauh/extensions/gcode_shell_cmd/__init__.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+
+# ======================================================================= #
+#  Copyright (C) 2020 - 2024 Dominik Willner <th33xitus@gmail.com>        #
+#                                                                         #
+#  This file is part of KIAUH - Klipper Installation And Update Helper    #
+#  https://github.com/dw-0/kiauh                                          #
+#                                                                         #
+#  This file may be distributed under the terms of the GNU GPLv3 license  #
+# ======================================================================= #
+
+from pathlib import Path
+
+
+EXT_MODULE_NAME = "gcode_shell_command.py"
+MODULE_PATH = Path(__file__).resolve().parent
+MODULE_ASSETS = MODULE_PATH.joinpath("assets")
+KLIPPER_DIR = Path.home().joinpath("klipper")
+KLIPPER_EXTRAS = KLIPPER_DIR.joinpath("klippy/extras")
+EXTENSION_SRC = MODULE_ASSETS.joinpath(EXT_MODULE_NAME)
+EXTENSION_TARGET_PATH = KLIPPER_EXTRAS.joinpath(EXT_MODULE_NAME)
+EXAMPLE_CFG_SRC = MODULE_ASSETS.joinpath("shell_command.cfg")
diff --git a/kiauh/extensions/gcode_shell_cmd/assets/gcode_shell_command.py b/kiauh/extensions/gcode_shell_cmd/assets/gcode_shell_command.py
new file mode 100644
index 0000000..bb38ae5
--- /dev/null
+++ b/kiauh/extensions/gcode_shell_cmd/assets/gcode_shell_command.py
@@ -0,0 +1,87 @@
+# Run a shell command via gcode
+#
+# Copyright (C) 2019  Eric Callahan <arksine.code@gmail.com>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+import os
+import shlex
+import subprocess
+import logging
+
+class ShellCommand:
+    def __init__(self, config):
+        self.name = config.get_name().split()[-1]
+        self.printer = config.get_printer()
+        self.gcode = self.printer.lookup_object('gcode')
+        cmd = config.get('command')
+        cmd = os.path.expanduser(cmd)
+        self.command = shlex.split(cmd)
+        self.timeout = config.getfloat('timeout', 2., above=0.)
+        self.verbose = config.getboolean('verbose', True)
+        self.proc_fd = None
+        self.partial_output = ""
+        self.gcode.register_mux_command(
+            "RUN_SHELL_COMMAND", "CMD", self.name,
+            self.cmd_RUN_SHELL_COMMAND,
+            desc=self.cmd_RUN_SHELL_COMMAND_help)
+
+    def _process_output(self, eventime):
+        if self.proc_fd is None:
+            return
+        try:
+            data = os.read(self.proc_fd, 4096)
+        except Exception:
+            pass
+        data = self.partial_output + data.decode()
+        if '\n' not in data:
+            self.partial_output = data
+            return
+        elif data[-1] != '\n':
+            split = data.rfind('\n') + 1
+            self.partial_output = data[split:]
+            data = data[:split]
+        else:
+            self.partial_output = ""
+        self.gcode.respond_info(data)
+
+    cmd_RUN_SHELL_COMMAND_help = "Run a linux shell command"
+    def cmd_RUN_SHELL_COMMAND(self, params):
+        gcode_params = params.get('PARAMS','')
+        gcode_params = shlex.split(gcode_params)
+        reactor = self.printer.get_reactor()
+        try:
+            proc = subprocess.Popen(
+                self.command + gcode_params, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+        except Exception:
+            logging.exception(
+                "shell_command: Command {%s} failed" % (self.name))
+            raise self.gcode.error("Error running command {%s}" % (self.name))
+        if self.verbose:
+            self.proc_fd = proc.stdout.fileno()
+            self.gcode.respond_info("Running Command {%s}...:" % (self.name))
+            hdl = reactor.register_fd(self.proc_fd, self._process_output)
+        eventtime = reactor.monotonic()
+        endtime = eventtime + self.timeout
+        complete = False
+        while eventtime < endtime:
+            eventtime = reactor.pause(eventtime + .05)
+            if proc.poll() is not None:
+                complete = True
+                break
+        if not complete:
+            proc.terminate()
+        if self.verbose:
+            if self.partial_output:
+                self.gcode.respond_info(self.partial_output)
+                self.partial_output = ""
+            if complete:
+                msg = "Command {%s} finished\n" % (self.name)
+            else:
+                msg = "Command {%s} timed out" % (self.name)
+            self.gcode.respond_info(msg)
+            reactor.unregister_fd(hdl)
+            self.proc_fd = None
+
+
+def load_config_prefix(config):
+    return ShellCommand(config)
diff --git a/kiauh/extensions/gcode_shell_cmd/assets/shell_command.cfg b/kiauh/extensions/gcode_shell_cmd/assets/shell_command.cfg
new file mode 100644
index 0000000..34e7581
--- /dev/null
+++ b/kiauh/extensions/gcode_shell_cmd/assets/shell_command.cfg
@@ -0,0 +1,7 @@
+[gcode_shell_command hello_world]
+command: echo hello world
+timeout: 2.
+verbose: True
+[gcode_macro HELLO_WORLD]
+gcode:
+    RUN_SHELL_COMMAND CMD=hello_world
\ No newline at end of file
diff --git a/kiauh/extensions/gcode_shell_cmd/gcode_shell_cmd_extension.py b/kiauh/extensions/gcode_shell_cmd/gcode_shell_cmd_extension.py
new file mode 100644
index 0000000..d8ed49b
--- /dev/null
+++ b/kiauh/extensions/gcode_shell_cmd/gcode_shell_cmd_extension.py
@@ -0,0 +1,127 @@
+#!/usr/bin/env python3
+
+# ======================================================================= #
+#  Copyright (C) 2020 - 2024 Dominik Willner <th33xitus@gmail.com>        #
+#                                                                         #
+#  This file is part of KIAUH - Klipper Installation And Update Helper    #
+#  https://github.com/dw-0/kiauh                                          #
+#                                                                         #
+#  This file may be distributed under the terms of the GNU GPLv3 license  #
+# ======================================================================= #
+
+import os
+import shutil
+from typing import List
+
+from kiauh.components.klipper.klipper import Klipper
+from kiauh.core.backup_manager.backup_manager import BackupManager
+from kiauh.core.base_extension import BaseExtension
+from kiauh.core.config_manager.config_manager import ConfigManager
+from kiauh.core.instance_manager.instance_manager import InstanceManager
+from kiauh.extensions.gcode_shell_cmd import (
+    EXTENSION_TARGET_PATH,
+    EXTENSION_SRC,
+    KLIPPER_DIR,
+    EXAMPLE_CFG_SRC,
+    KLIPPER_EXTRAS,
+)
+from kiauh.utils.filesystem_utils import check_file_exist
+from kiauh.utils.input_utils import get_confirm
+from kiauh.utils.logger import Logger
+
+
+# noinspection PyMethodMayBeStatic
+class GcodeShellCmdExtension(BaseExtension):
+    def install_extension(self, **kwargs) -> None:
+        install_example = get_confirm("Create an example shell command?", False, False)
+
+        klipper_dir_exists = check_file_exist(KLIPPER_DIR)
+        if not klipper_dir_exists:
+            Logger.print_warn(
+                "No Klipper directory found! Unable to install extension."
+            )
+            return
+
+        extension_installed = check_file_exist(EXTENSION_TARGET_PATH)
+        overwrite = True
+        if extension_installed:
+            overwrite = get_confirm(
+                "Extension seems to be installed already. Overwrite?", True, False
+            )
+
+        if not overwrite:
+            Logger.print_warn("Installation aborted due to user request.")
+            return
+
+        im = InstanceManager(Klipper)
+        im.stop_all_instance()
+
+        try:
+            Logger.print_status(f"Copy extension to '{KLIPPER_EXTRAS}' ...")
+            shutil.copy(EXTENSION_SRC, EXTENSION_TARGET_PATH)
+        except OSError as e:
+            Logger.print_error(f"Unable to install extension: {e}")
+            return
+
+        if install_example:
+            self.install_example_cfg(im.instances)
+
+        im.start_all_instance()
+
+        Logger.print_ok("Installing G-Code Shell Command extension successfull!")
+
+    def remove_extension(self, **kwargs) -> None:
+        extension_installed = check_file_exist(EXTENSION_TARGET_PATH)
+        if not extension_installed:
+            Logger.print_info("Extension does not seem to be installed! Skipping ...")
+            return
+
+        question = "Do you really want to remove the extension?"
+        if get_confirm(question, True, False):
+            try:
+                Logger.print_status(f"Removing '{EXTENSION_TARGET_PATH}' ...")
+                os.remove(EXTENSION_TARGET_PATH)
+                Logger.print_ok("Extension successfully removed!")
+            except OSError as e:
+                Logger.print_error(f"Unable to remove extension: {e}")
+
+            Logger.print_warn("PLEASE NOTE:")
+            Logger.print_warn(
+                "Remaining gcode shell command will cause Klipper to throw an error."
+            )
+            Logger.print_warn("Make sure to remove them from the printer.cfg!")
+
+    def install_example_cfg(self, instances: List[Klipper]):
+        cfg_dirs = [instance.cfg_dir for instance in instances]
+        # copy extension to klippy/extras
+        for cfg_dir in cfg_dirs:
+            Logger.print_status(f"Create shell_command.cfg in '{cfg_dir}' ...")
+            if check_file_exist(cfg_dir.joinpath("shell_command.cfg")):
+                Logger.print_info("File already exists! Skipping ...")
+                continue
+            try:
+                shutil.copy(EXAMPLE_CFG_SRC, cfg_dir)
+                Logger.print_ok("Done!")
+            except OSError as e:
+                Logger.warn(f"Unable to create example config: {e}")
+
+        # backup each printer.cfg before modification
+        bm = BackupManager()
+        for instance in instances:
+            bm.backup_file(
+                [instance.cfg_file],
+                custom_filename=f"{instance.suffix}.printer.cfg",
+            )
+
+        # add section to printer.cfg if not already defined
+        section = "include shell_command.cfg"
+        cfg_files = [instance.cfg_file for instance in instances]
+        for cfg_file in cfg_files:
+            Logger.print_status(f"Include shell_command.cfg in '{cfg_file}' ...")
+            cm = ConfigManager(cfg_file)
+            if cm.config.has_section(section):
+                Logger.print_info("Section already defined! Skipping ...")
+                continue
+            cm.config.add_section(section)
+            cm.write_config()
+            Logger.print_ok("Done!")
diff --git a/kiauh/extensions/gcode_shell_cmd/metadata.json b/kiauh/extensions/gcode_shell_cmd/metadata.json
new file mode 100644
index 0000000..cfb38b4
--- /dev/null
+++ b/kiauh/extensions/gcode_shell_cmd/metadata.json
@@ -0,0 +1,9 @@
+{
+  "metadata": {
+    "index": 1,
+    "module": "gcode_shell_cmd_extension",
+    "maintained_by": "dw-0",
+    "display_name": "G-Code Shell Command",
+    "description": "Allows to run a shell command from gcode."
+  }
+}