VI Editor Reference Manual

Miles O'Neal
(meo@rru.com)

Susan Liebeskind
(shl@cc.gatech.edu)

Systems & Software Solutions

August 3, 1998

ABSTRACT

This manual gives a brief overview of the more common vi commands. It is a companion to the Vi Introductory Guide.

Copyright 1988, 1989, 1991, 1993, 1994, & 1998 by Susan Liebeskind (Atlanta, GA) and Miles O'Neal (Austin, TX). All rights reserved. Permission is hereby granted to redistribute this in either source or formatted form, so long as this copyright & the author's names are included, unmodified in content, and so long as no charge beyond reasonable cost of reproduction is charged. Notwithstanding, inclusion in any other work or collection which is sold, rented, or otherwise charged for, is prohibited without express consent of the authors.

Revision History:
Rev. 1.1 Jan 9, 1990 meo
Rev. 1.2 Jan 1, 1992 meo
Rev. 1.3 Mar 22, 1994 meo
Rev. 1.4 Aug 3, 1998 meo

Table of Contents

1. Introduction
2. Command Mode vs Text Mode
3. Cursor Motion
4. Editing Commands
    4.1. Delete Commands
    4.2. Replace and Change Commands
    4.3. Search Commands
    4.4. Undo Command
    4.5. Saving & Exiting Commands
    4.6. Search & Replace Command
    4.7. Yank (Copy) Commands
    4.8. Put (Paste) Commands
    4.9. Miscellaneous Commands
5. Miscellaneous Notes

1. Introduction

This is a brief, introductory reference for vi. It is supplemental to the VI Introductory Guide and your vendor documentation.

Vi is actually a very powerful editor, and is organized in a logical fashion. It is different from other editors or word processors, which may make learning it just a little bit tricky for some people. If you approach it analytically and fearlessly, you should become proficient with it in a short period of time.

I highly recommend experimentation. For obvious reasons you should restrict early experimentation to test files.

Some non-display character keys and other keys have special functions. These keys will be shown by placing their name (such as RETURN) in square brackets, like this: [RETURN].

Unlike most non UNIX1 products, vi is case-sensitive. Be careful with the [CAPS LOCK] key (except in input mode). If things are acting strange, make sure [CAPS LOCK] is off. If you are unsure about this, a good test is to press the `j' key; if it moves the cursor down a line, [CAPS LOCK] is not on; if it joins the next line to the current line, [CAPS LOCK] is on.

Not all of the commands mentioned here are covered in the VI Introductory Guide. There are also far more commands available in vi than are covered here - for further information check your system documentation or get one of the books available on vi.

Special Keys
KeyCommand ModeText Mode
Arrow Keys cursor movement N/A
[CTRL] used with other keys for extra commands insert control characters in text
[ENTER] or [RETURN] down 1 line normal function
[ESC] N/A leave text mode
Space Bar move right 1 character normal function
[TAB] N/A normal function

When a command is shown as a combination of the `^' (caret) and another character, as in ^V, this means press the [CTRL] key first, and hold it down while you press and release the other key.

2. Command Mode vs Text Mode

Vi is always either in command mode or text (input) mode. In text mode any character key pressed is enetered into the file. Most other typewriter keys have their normal effect. On some systems to enter a [CTRL] key sequence, you may first have to enter ^V before the sequence you want.

In command mode nearly every key on the keyboard performs some command or modifies the next command. Some of these commands may be difficult to recover from, so be careful in command mode to enter only the commands you wish to enter.

The [RETURN] key is not needed in command mode except with commands that begin with a `:' (colon) and with the search comands.

Mode Change Commands
aappend text after cursor
iinsert text before cursor
oopen new line after current line & add text
Oopen new line before current line & add text
[ESC]leave text mode

3. Cursor Motion

Cursor motion should nominally include use of the cursor keys. If your terminal lacks or has problems with arrow keys in vi command mode, the `h', `j', `k', and `l' keys will perform the same functions, as noted below.

Cursor Motion Commands
hmove back 1 character
lmove forward 1 character
jmove down 1 line
kmove up 1 line
 
bback to beginning of word
eforward to end of word
wforward to beginning of next word
^go to first displayable character of line
0go to beginning of line
$go to end of line
 
<CTRL>Fforward 1 screen
<CTRL>Bbackward 1 screen
<CTRL>Ddown (forward) 1/2 screen
<CTRL>Uup (backward) 1/2 screen

4. Editing Commands

These are the commands that actually manipulate text. the commands listed here include those which delete, replace, search, cut, and paste text, as well as those used for saving text and abandoning an edit session. Finally, a few miscellaneous commands are included which don't fit into the other categories.

4.1. Delete (Cut) Commands

In some editors the delete commands may be called cut commands. The last item deleted is saved in a buffer and may be put (or pasted) elsewhere in the file as noted later.

Delete Commands
xdelete character
dwdelete rest of word
d$delete rest of line
Ddelete rest of line
dddelete line

4.2. Replace, Change and Substitute Commands

Some editors provide commands to substitute new text occurances of search strings; this is not the same thing. These following vi commands allows you to replace some number of characters, words, lines or parts of lines with new text.

The change and substitute commands, the editor puts you into insert mode until you press [ESC]. The replace command replaces 1 (or more) characters with the next character you type.

Replace Commands
rreplace character
cwchange rest of word
c$change rest of line
Cchange rest of line
Nssubstitute text for N characters

4.3. Search Commands

These commands let you search for a text string, which may include regular expressions. They must be followed by a [RETURN].

Search Commands
/textsearch forward for text
?textsearch backward for text
nsearch in same direction for next occurance of last-searched-for text
Nsearch in other direction for next occurance of last-searched-for text

4.4. Undo Command

IN the real vi, the undo command only undoes the last command, even if that is an undo command. Repeated undo commands simply toggle the effect of the last command before the series of undo commands.

Some vi clones, such as vim, allow multiple undo's. These usually offer a way to set the undo level to the standard vi mode. See your editor's man page or reference manual for details.

Undo Command
uundo last command (BE CAREFUL WITH THIS)

4.5. Saving & Exiting Commands

These commands must be followed by a [RETURN].

Saving & Exiting Commands
:wwrite (save) the file
:w NAMEwrite the file and name it NAME
:w! NAMErewrite the file named NAME
:wqwrite the file and quit the editor
:qquit the editor
:q!quit the editor (abandoning any changes)

4.6. Search & Replace Command

To find & replace all occurances of a particular text string, use the command:
    :%s/text1/text2/g[RETURN]
which replaces all occurances of text1 with text2.

4.7. Yank (Copy) Commands

The vi yank command is similar to the copy command in many editors. It copies the text into a buffer. The text may be put (pasted) elsewhere in the file as described under the Put command.

Yank Commands
ywyank rest of word
y$yank rest of line
yyyank entire line
Yyank entire line

4.8. Put (Paste) Commands

The vi put command is similar to the paste command in many other editors. It will paste whatever is in the buffer from either the previous delete or yank command.

Put Commands
pput yanked/deleted text before cursor
Pput yanked/deleted text after cursor

If you yanked/deleted a whole line (or group of lines), p and P paste the text before or after the current line, respectively; otherwise, they paste the text before or after the cursor, respectively, on the current line.

4.9. Miscellaneous Commands

Miscellaneous Commands
.repeat last command (BE CAREFUL WITH THIS)
Jjoin next line to end of this line

NOTE

The period, or dot, command repeats most commands, but not quite all. It should work with all of the commands listed in this document; if you aren't sure of what you're doing, save your work before you try something.

5. Miscellaneous Notes

Most commands (other than those beginning with a colon (`:') may be preceded by a repeat count. For example,
    3dd
would delete 3 lines, starting with the current one.

Vi will not let you delete more lines than are in the file, so the above example would not work on the last line; vi would beep at you instead.


Notes:
[1] UNIX is a trademark of Western Electric, AT&T, SCO, or whoever bought it this week.
Last updated: 04 August 1998

Copyright 1988, 1989, 1991, 1993, 1994, & 1998 Miles O'Neal, Austin, TX, and Susan Liebeskind, Atlanta, GA. All rights reserved.


Miles O'Neal <meo@rru.com>
c/o RNN / 11501 Johnson Rd / Leander, TX / 78641-5823