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vi Reference

 Tip courtesy of Kyle Reynolds at http://www.camelrichard.org

vi reference
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Editing commands

Moving around the file

h  cursor left     j  cursor right
k  cursor up       l  cursor down
^  & B    Beginning of line 
$         end of line
)     Next sentance
(     Previous sentance
}     Next Paragraph
{     Previous  Paragraph

:$   end of file
w    one character forward
W    one word forward
:20  go to Line no 20 or whatever number you give

displaying file info .

^g  give name of the file  current line and total lines of a file at the bottom .

Inserting and appending text :
i inserts text to the left of  cursor
I inserts in the beginning of line
a appends text to right of cursor
A appends to the end of line

Adding new line

o add a new line below the current line
O adds a new line above the current line.

deleting the text :

x   deletes text above the text
X   deletes text character on  right of cursor
20d deletes line 20
dd  deletes current line
D   delete till end of current line.
    
Replacing a character & word
r   replace the character above the cursor.
R   replces characters until Esc is pressed.
cw  replaces the word from cursor to the end indicated by $ sign .
C   replaces till end of line.
    
Substitute
s   subistutes current charcater.
S   substitutes entire line.
    
Repeating  last command
.  repeats the last text.
    
Undo the last change
u  undo last change.
U undo changes to the current line.
    
Copy and pasting lines
yy   copys the current line into buffer.
5yy  copies 5 lines from the current line.
p    pastes the current buffer.
    
Recovering a unsaved vi file.
vi -r  filename  restores a unsaved / crashed file from buffer.
    
Searching
:/name    & return searches for the word name in the file
n continues search forward.
N searches backwards.
    
Substitution
:1,$s/<search-string>/<replace-string>/g
    
Saving
:w    saves the text does not quit.
:wq   saves & quit the editor .
ZZ    save
:q!   Quit without saving