VIM Basics
Movement
h = Left
j = Down
k = Left
l = Up
{n}j = Down {n} lines
$ = Move to end of line
Ctrl + N = Open/close the sidebar
Editing
x = Delete letter under cursor
i = Edit mode
a = Append mode
A = Move to end of line and enter append mode
dd = Delete whole line
<number>dd = Delete lines below the cursor
ESC = Back to command mode
u = Undo last change
Saving
:q! = Quit without saving
:w = Write file
,w = Write file with custom leader from vimrc
:wq = Write and quit
Useful
:! <command> = Run a terminal command