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Friday, December 14, 2007

VI Editor Commands

General Startup


To use vi: vi filename
To exit vi and save changes: ZZ or :wq
To exit vi without saving changes: :q!
To enter vi command mode: [esc]


Counts


A number preceding any vi command tells vi to repeat
that command that many times.


Cursor Movement



h move left (backspace)

j move down

k move up

l move right (spacebar)

[return] move to the beginning of the next line

$ last column on the current line

0 move cursor to the first column on the
current line

^ move cursor to first nonblank column on the
current line

w move to the beginning of the next word or
punctuation mark

W move past the next space

b move to the beginning of the previous word
or punctuation mark

B move to the beginning of the previous word,
ignores punctuation

e end of next word or punctuation mark

E end of next word, ignoring punctuation

H move cursor to the top of the screen

M move cursor to the middle of the screen

L move cursor to the bottom of the screen


Screen Movement



G move to the last line in the file

xG move to line x

z+ move current line to top of screen

z move current line to the middle of screen

z- move current line to the bottom of screen

^F move forward one screen

^B move backward one line

^D move forward one half screen

^U move backward one half screen

^R redraw screen
( does not work with VT100 type terminals )

^L redraw screen
( does not work with Televideo terminals )



Inserting



r replace character under cursor with next
character typed

R keep replacing character until [esc] is hit

i insert before cursor

a append after cursor

A append at end of line

O open line above cursor and enter append mode



Deleting



x delete character under cursor

dd delete line under cursor

dw delete word under cursor

db delete word before cursor



Copying Code



yy (yank)'copies' line which may then be put by
the p(put) command. Precede with a count for
multiple lines.



Put Command


brings back previous deletion or yank of lines,
words, or characters

P bring back before cursor

p bring back after cursor


Find Commands



? finds a word going backwards

/ finds a word going forwards

f finds a character on the line under the
cursor going forward

F finds a character on the line under the
cursor going backwards

t find a character on the current line going
forward and stop one character before it

T find a character on the current line going
backward and stop one character before it

; repeat last f, F, t, T




Miscellaneous Commands



. repeat last command

u undoes last command issued

U undoes all commands on one line

xp deletes first character and inserts after
second (swap)

J join current line with the next line

^G display current line number

% if at one parenthesis, will jump to its mate

mx mark current line with character x

'x find line marked with character x

NOTE: Marks are internal and not written to the file.



Line Editor Mode


Any commands form the line editor ex can be issued
upon entering line mode.

To enter: type ':'

To exit: press[return] or [esc]



ex Commands


For a complete list consult the
UNIX Programmer's Manual



READING FILES


copies (reads) filename after cursor in file
currently editing

:r filename


WRITE FILE



:w saves the current file without quitting



MOVING



:# move to line #

:$ move to last line of file



SHELL ESCAPE


executes 'cmd' as a shell command.

:!'cmd'