diff --git a/README.md b/README.md
index cedde0b..49e210e 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,14 @@ A few Snippets to help hacking
 
 
 ```
-{ "SirAppsec/hacker-helper.nvim", lazy = true }
+{
+    "SirAppsec/hacker-helper.nvim",
+    opts = {
+        keys = {
+            run_exec = "<leader>re",  -- Run: Execute Command from Line Selection
+        }
+    }
+}
 ```
 
 
diff --git a/doc/hacker-helper-docs.txt b/doc/hacker-helper-docs.txt
index 64a6749..03e5920 100644
--- a/doc/hacker-helper-docs.txt
+++ b/doc/hacker-helper-docs.txt
@@ -1,4 +1,4 @@
-*my-template-docs.txt*     For Neovim >= 0.8.0    Last change: 2024 January 18
+*hacker-helper-docs.txt*     For Neovim >= 0.8.0    Last change: 2024 Sptember 06
 
 ==============================================================================
 Table of Contents                         *my-template-docs-table-of-contents*
diff --git a/lua/hacker-helper.lua b/lua/hacker-helper.lua
index 249e0a5..23da91a 100644
--- a/lua/hacker-helper.lua
+++ b/lua/hacker-helper.lua
@@ -3,7 +3,12 @@ local module = require("hacker-helper.module")
 
 ---@class Config
 ---@field opt string Your config option
+---@field keys table<string, string> Key mappings
 local config = {
+  prefix = "<leader>r", -- Default prefix for Hacker Helper
+  keys = {
+    run_exec = "e", -- Default mapping for executing in terminal
+  },
   opt = "Hello!",
 }
 
@@ -13,11 +18,41 @@ local M = {}
 ---@type Config
 M.config = config
 
----@param args Config?
 -- you can define your setup function here. Usually configurations can be merged, accepting outside params and
 -- you can also put some validation here for those.
-M.setup = function(args)
-  M.config = vim.tbl_deep_extend("force", M.config, args or {})
+---@param user_config Config? User-provided configuration
+M.setup = function(user_config)
+  -- Merge user configuration with defaults
+  M.config = vim.tbl_deep_extend("force", M.config, user_config or {})
+
+  -- Set the key mappings dynamically based on the prefix
+  local full_run_exec_mapping = M.config.prefix .. M.config.keys.run_exec
+  vim.api.nvim_set_keymap(
+    "n",
+    full_run_exec_mapping,
+    ':lua require("hacker-helper.module").exec_line_or_selection_in_term()<CR>',
+    { noremap = true, silent = true, desc = "Execute Command" }
+  )
+  vim.api.nvim_set_keymap(
+    "v",
+    full_run_exec_mapping,
+    ':lua require("hacker-helper.module").exec_line_or_selection_in_term()<CR>',
+    { noremap = true, silent = true, desc = "Execute Command" }
+  )
+
+  -- Register with which-key if available
+  if package.loaded["which-key"] then
+    -- Register the prefix <leader>r with a name
+    require("which-key").add({
+      [M.config.prefix] = {
+        name = "Hacker Helper", -- Prefix name
+        [M.config.keys.run_exec] = {
+          ":lua require('hacker-helper.module').exec_line_or_selection_in_term()<CR>",
+          "Execute in Terminal",
+        },
+      },
+    })
+  end
 end
 
 M.hello = function()
diff --git a/lua/hacker-helper/module.lua b/lua/hacker-helper/module.lua
index 78a9962..f29c881 100644
--- a/lua/hacker-helper/module.lua
+++ b/lua/hacker-helper/module.lua
@@ -5,5 +5,73 @@ local M = {}
 M.my_first_function = function(greeting)
   return greeting
 end
+-- Initialize the toggleterm plugin if not already done
+-- require('toggleterm').setup {
+--   direction = 'vertical',
+--   size = 50,
+-- }
+
+-- Function to execute the current line or visual selection in an existing terminal
+function M.exec_line_or_selection_in_term()
+  -- Initialize the toggleterm plugin if not already done
+  local ok, toggleterm = pcall(require, 'toggleterm')
+  if ok then
+    toggleterm.setup {
+      direction = 'vertical',
+      size = 50,
+    }
+  else
+    print("toggleterm is not installed or cannot be loaded.")
+    return
+  end
+
+  local mode = vim.api.nvim_get_mode().mode
+  local lines = {}
+
+  if mode == 'v' then
+    -- Get the visually selected lines
+    local start_pos = vim.fn.getpos("'<")
+    local end_pos = vim.fn.getpos("'>")
+    lines = vim.fn.getline(start_pos[2], end_pos[2])
+  else
+    -- Get the current line
+    table.insert(lines, vim.fn.getline('.'))
+  end
+
+  -- Find the existing terminal buffer
+  local term_bufnr = nil
+  local buffers = vim.api.nvim_list_bufs()
+
+  for _, buf in ipairs(buffers) do
+    if vim.api.nvim_buf_get_option(buf, 'buftype') == 'terminal' then
+      term_bufnr = buf
+      break
+    end
+  end
+
+  if term_bufnr then
+    -- Switch to the terminal buffer
+    vim.api.nvim_set_current_buf(term_bufnr)
+
+    -- Safely check if the terminal job ID exists
+    local term_job_id = vim.b.terminal_job_id
+    if not term_job_id then
+      print("No terminal job ID found.")
+      return
+    end
+
+    -- Send the command to the terminal
+    for _, line in ipairs(lines) do
+      vim.api.nvim_chan_send(term_job_id, line .. "\n")
+    end
+
+    -- Switch back to the previous buffer
+    vim.cmd("b#")
+  else
+    print("No terminal buffer found.")
+  end
+end
+
+-- End of Function
 
 return M
diff --git a/plugin/hacker-helper.lua b/plugin/hacker-helper.lua
index 2e3cd2e..27269cc 100644
--- a/plugin/hacker-helper.lua
+++ b/plugin/hacker-helper.lua
@@ -1 +1,8 @@
 vim.api.nvim_create_user_command("HackerHelper", require("hacker-helper").hello, {})
+-- Key mappings for executing in terminal
+
+-- Key mappings for executing in terminal
+vim.api.nvim_set_keymap('n', '<leader>re', ':lua require("hacker-helper.module").exec_line_or_selection_in_term()<CR>',
+  { noremap = true, silent = true })
+vim.api.nvim_set_keymap('v', '<leader>re', ':lua require("hacker-helper.module").exec_line_or_selection_in_term()<CR>',
+  { noremap = true, silent = true })