added line numbers in prog-modes

config.org

@@ -1470,3 +1470,10 @@ then it takes a second \\[keyboard-quit] to abort the minibuffer."
               (height . 70))))
   )   
    #+END_SRC
+** Line numbers
+   #+BEGIN_SRC emacs-lisp
+(use-package linum
+  :ensure t
+  :init
+  (add-hook 'prog-mode-hook 'linum-mode))   
+   #+END_SRC