Finally added stuff for ibuffer

custom.el

@@ -9,7 +9,7 @@
  '(elpy-eldoc-show-current-function nil)
  '(package-selected-packages
    (quote
-    (ag string-inflection tiny powershell diffview ivy-hydra window-numbering php-mode swiper mode-line-bell htmlize cython-mode blacken dired-narrow lua-mode browse-kill-ring clipmon free-keys org-link-minor-mode js2-mode js2-refactor xref-js2 python-django visual-regexp-steroids pcre2el vimrc-mode iedit transient magit dracula-theme flycheck elpy ein better-defaults ssh-config-mode yaml-mode apache-mode web-mode undo-tree)))
+    (ibuffer-vc ag string-inflection tiny powershell diffview ivy-hydra window-numbering php-mode swiper mode-line-bell htmlize cython-mode blacken dired-narrow lua-mode browse-kill-ring clipmon free-keys org-link-minor-mode js2-mode js2-refactor xref-js2 python-django visual-regexp-steroids pcre2el vimrc-mode iedit transient magit dracula-theme flycheck elpy ein better-defaults ssh-config-mode yaml-mode apache-mode web-mode undo-tree)))
  '(reb-re-syntax (quote string)))
 (custom-set-faces
  ;; custom-set-faces was added by Custom.

settings.org

@@ -1,5 +1,33 @@
 * Global
 ** Add features/modes
+*** ibuffer-mode
+#+BEGIN_SRC emacs-lisp
+(require 'ibuffer-vc)
+(add-hook 'ibuffer-mode-hook (lambda ()
+			       (ibuffer-vc-set-filter-groups-by-vc-root)))
+
+(global-set-key (kbd "C-x C-b") 'ibuffer)
+;; Use human readable Size column instead of original one
+(define-ibuffer-column size-h
+  (:name "Size" ;; :inline t
+	 )
+  (cond
+   ((> (buffer-size) 1000000) (format "%7.1fM" (/ (buffer-size) 1000000.0)))
+   ((> (buffer-size) 100000) (format "%7.0fk" (/ (buffer-size) 1000.0)))
+   ((> (buffer-size) 1000) (format "%7.1fk" (/ (buffer-size) 1000.0)))
+   (t (format "%8d" (buffer-size)))))
+
+;; Modify the default ibuffer-formats
+(setq ibuffer-formats
+      '((mark modified read-only " "
+	      (name 18 18 :left :elide)
+	      " "
+	      (size-h 9 -1 :right)
+	      " "
+	      (mode 16 16 :left :elide)
+	      " "
+	      filename-and-process)))
+#+END_SRC
 *** string-inflection
 #+BEGIN_SRC emacs-lisp
 (require 'string-inflection)