Command Mode (press Esc to enable)

Enter : enter edit mode
Shift-Enter : run cell, select below
Ctrl-Enter : run cell
Alt-Enter : run cell, insert below
Y : to code
M : to markdown
R : to raw
1 : to heading 1
2 : to heading 2
3 : to heading 3
4 : to heading 4
5 : to heading 5
6 : to heading 6
Up : select cell above
K : select cell above
Down : select cell below
J : select cell below
A : insert cell above
B : insert cell below
X : cut selected cell
C : copy selected cell
Shift-V : paste cell above
V : paste cell below
Z : undo last cell deletion
D,D : delete selected cell
Shift-M : merge cell below
S : Save and Checkpoint
Ctrl-S : Save and Checkpoint
L : toggle line numbers
O : toggle output
Shift-O : toggle output scrolling
Esc : close pager
Q : close pager
H : show keyboard shortcut help dialog
I,I : interrupt kernel
0,0 : restart kernel
Space : scroll down
Shift-Space : scroll up
Shift : ignore

Edit Mode (press Enter to enable)

Tab : code completion or indent
Shift-Tab : tooltip
Ctrl-] : indent
Ctrl-[ : dedent
Ctrl-A : select all
Ctrl-Z : undo
Ctrl-Shift-Z : redo
Ctrl-Y : redo
Ctrl-Home : go to cell start
Ctrl-Up : go to cell start
Ctrl-End : go to cell end
Ctrl-Down : go to cell end
Ctrl-Left : go one word left
Ctrl-Right : go one word right
Ctrl-Backspace : delete word before
Ctrl-Delete : delete word after
Esc : command mode
Ctrl-M : command mode
Shift-Enter : run cell, select below
Ctrl-Enter : run cell
Alt-Enter : run cell, insert below
Ctrl-Shift-Subtract : split cell
Ctrl-Shift-- : split cell
Ctrl-S : Save and Checkpoint
Up : move cursor up or previous cell
Down : move cursor down or next cell
Shift : ignore

출처