Vi, Vim, Vscode editors

VI or VIM

drop to bash

:!bash   or   :!sh

edit other file

:e file.txt    #autocomplite works

redirect command STDOUT to the current edited file in the cursor position

:r!dir

show line number

:set number    or  :set nu

find and replace VI translates to substitute

:%s/wily/trusty/g    #substitute all wily with trusty in all document
:s/wily/trusty/g     #substitute only in the current line

Undo and redo

 u -undo last change
 Ctrl-R -redo changes which were undone (undo the undos). '.' to repeat a previous change, at the current cursor position

VIM only

Split

:split   or   :vsplit
C^w, c -close current window
C^w, C^w - switch between windows