vi filename	Open file
vi -r filename	Recover a file from a crashed session
vi + filename	Place the cursor on last line of the file
vi +n filename	Place the cursor on nth line "n" the file
vi +/pattern filename	Place cursor on line with first occurrence of “pattern”
:w	Write the file to disk
:w!	Write the file to disk even if read only
:wq	Write the file to disk and exit
:wq!	Write the file to disk even if read only and quit
:q	Quit
:q!	Force Quit
A	Move to end of the line and change to insert mode.
h	(left arrow)
j	(down arrow)
k	(up arrow)
l	(right arrow)
w	Move cursor to start of the next word
b	Move cursor to start of the previous word
:n	Go to nth line
i	Go into insert mode
o	Add a line below cursor and go into insert mode
x	Delete character
D	Delete line from the right of cursor to the end of  the line
dd	Delete line
u	Undo last edit
yy	Yank current line
p	Put yanked text before the cursor
/pattern	Search for "pattern" in the file going forwards
?pattern	Search for "pattern" in the file going backwards
n	Find the next occurrence of pattern found forwards
N	Find next occurrence of pattern found backwards