A text editor is a program that can be used to create and modify
text files. One of the most popular editors on Unix systems is vi Editor.
Three modes are available in Vi editor.
Commands which are used in Vi :
h move cursor one character to left
j move cursor one line down
k move cursor one line up
l move cursor one character to right
w move cursor one word to right
b move cursor one word to left
0 move cursor to beginning of line
$ move cursor to end of line
nG move cursor to line n
control-f scroll forward one screen
control-b scroll backward one screen
i insert to left of current cursor position (end with ESC)
a append to right of current cursor position(end with ESC)
dw delete current word (end with ESC)
cw change current word (end with ESC)
r change current character
~ change case (upper-, lower-) of current character
dd delete current line
D delete portion of current line to right of the cursor
x delete current character
ma mark currrent position
d`a delete everything from the marked position to here
`a go back to the marked position
p dump out at current place your last deletion (``paste'')
u undo the last command
. repeat the last command
J combine (``join'') next line with this one
:w write file to disk, stay in vi
:q! quit VI, do not write file to disk,
ZZ write file to disk, quit vi
:r filename read in a copy of the specified file to the current
buffer
/string search forward for string (end with Enter)
?string search backward for string (end with Enter)
n repeat the last search ("next search'')
:s/s1/s2 replace ("substitute'') (the first) s1 in this line by s2
:lr/s/s1/s2/g replace all instances of s1 in the line range lr by s2
For more free linux tutorial on vi editor refer linux.org