vi editor

vi Reference
vi Short reference.pdf

vi Editing  commands

vi command	description
i	insert at the current position
I	insert at the beginning of line
a	append just after the current cursor position
A	append at the end of line
o	Open a new line below the current line
O	Open a new line above the current line

vi Navigation commands

vi command	description
0	move to beginning of the current line
$	move to end of line
H	move to the top of the current window (high)
M	move to the middle of the current window (middle)
L	move to the bottom line of the current window (low)
1G	move to the first line of the file
20G	move to the 20th line of the file
G	move to the last line of the file