if it helps someone, in Emacs (evil-mode)

for a selection

:'<,'>s/OLD/NEW/

current line

:s/OLD/NEW/

all the file

:%s/OLD/NEW/

also to:

• ignore case add an /i :s/asd/ewq/i
• confirm case add an /c :%s/asd/ewq/c
  • y (yes)
  • n (skip)
  • a (all)
  • q (cancel)
  • l (replace this, and quit)