Navigation Keys - These are used in command mode:
$ 			Move to end of line
^ 		Move to beginning of line
  Save and Quit Commands - These are used in lastline mode:
:w 			Write buffer (Save changes and continue working in vi Editor)
:w new_filename 	Write buffer to new filename (continue working in vi)
:wq 			Write buffer (save changes) and quit vi
:q! 			Quit without saving changes
:wq! 			Write buffer (save changes) and quit vi
     			(The ! will override Read only permissions but only if you are the owner of the file.)

Basic Text Deletion Commands  - These are used in command mode:
x 			Delete character at the cursor
dw 			Delete word (or part of word to right of cursor)
3dw 			Delete three words
dd 			Delete line containing the cursor
3dd			Delete three lines

Undo and Change Commands - These are used in command mode:
r 			Replace character at cursor with one other character
u 			Undo previous command

Copy and Paste Text - These are used in command mode:
yy 			Yank a copy of this line and place in the clipboard
yy 3			Yank a copy of next 3 lines and place them in the clipboard
yw 			Yank a copy of this word and place in the clipboard
yw 3			Yank a copy of next 3 words and place them in the clipboard
p 			Put (paste) yanked or deleted line below current line
P (upper case) 	Put (paste) yanked or deleted line above current line

Basic Search Commands- These are used in lastline mode:
G (upper case) 	Go to last line of file
H (upper case)  Go to top line of file
:21 			Go to line 21
/string 		Search forward for this string of text
?string 		Search backward for this string of text
n 			Find next occurrence of this string of text

Session Customizing Commands
:set nu 		Show line numbers
:set nonu 		Hide line numbers
:set showmode 	Display current mode of operation
:set noshowmode 	Turn off mode display
:set 			Display all vi variables set
:set all 		Display all possible vi variables and their current