VI Commands:

VI is like a text editor for linux command line, SSH, telnet etc not unlike notepad for windows.

VI Commands:

i                            insert mode, (ESC to exit insert mode) allows text to be entered on the screen
a                           Append to right mode
/word                  Move to the occurrence of “word”
n                           Locate the next occurance
w                          Advance to the next word
e                           Advance to the next end of a word
b                          Move to the previous word
3b                        Move backward 3 words
dd                        delete line
3dd                      delete 3 lines
D                          Delete remainder of a line
dw                        Delete word
x                          Delete character
o                          Open space for new line below the cursor line
O                         Open a line above the cursor
CTRL-w             Move back a word in append mode
u                          Undo last
U                         Undo all changes to current line
.                           In command mode, repeat the last text changing the command on the current line
:w newfilename        save the file to newfilename from the command mode
:wq                      save and quit
:q!                       quit without saving
r                          replace then typa a character ot be replaced with r then return to break up a line
J                          join 2 lines
s                          substitute (sentence) typed text over a character, ESC when done
cw                       change word
c                          change part of a line from the cursor to the end of the line
cc                        substitute new text for aline, ESC when done
h                          move the cursor back one space
H                          move the cursor to the highest line on the screen
L                          move the cursor to the lowest line on the screen
M                         position the cursor at the midpoint on the screen
G                          last line in the file
0 (zero)               Move the cursor to the beginning of the line it is on
view filename     Open a file for viewing only
set number         Turn on line numbers
set nonumber     Turn off line numbers

Options:

number
autoindent (ai)                 ctrl-d to move to the left
showmatch                       match brackets and parenthesis
tabstop=4
wrapmargine(wm)         when line is wrapped (80-value)
:2 copy 4                          Place a copy of line 2 after line 4.
:1,4                                    copy 7 (lines 1-4)
:n                                       Access the next file for editing