vi is a text editor available on Unix systems that uses keyboard commands instead of arrow keys or function keys. It displays 24 lines of text at a time from the file being edited. While vi allows adding, changing, and deleting text, it is not a word processor and does not provide formatting capabilities. Some basic vi commands include opening and closing files, moving around with hjkl keys, and elementary editing commands like inserting text and copying/pasting. More advanced features include using regular expressions to search and substitute text.

1. Tuffarsi in VIM
http://www.vim.org
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2. Story
The vi editor is available on almost all Unix systems. vi
can be used from any type of terminal because it does
not depend on arrow keys and function keys--it uses the
standard alphabetic keys for commands.
vi (pronounced "vee-eye") is short for "vi"sual editor. It
displays a window into the file being edited that shows 24
lines of text. vi is a text editor, not a "what you see is
what you get" word processor. vi lets you add, change,
and delete text, but does not provide such formatting
capabilities as centering lines or indenting paragraphs.

3. WTF
● Opening and closing a file (vi file / :wq / ZZ / q!)
● VI Mode (Insert Mode | Command Mode)
● Moving around in a file (h j k l / ^ $ / gt / gf)
● Elementary editing ( Esc / i / a / o / O / yy / p)
● Copy & Cut & Paste (yy | D | p | P | )
● Play with regexp ( edit, substitute, search )
● Tips & Tricks

4. Power is nothing without control
➔ On first problem try:
$ man vim
➔ On second problem try:
:help [keyword]
➔ Ok, now ?
vi has many other commands and options not described here. The following
resources can help you get started using the vi editor.
VIMDOC: http://vimdoc.sourceforge.net/
VIMFAQ: http://vimdoc.sourceforge.net/htmldoc/vimfaq.html
VIMTUTOR: http://www.oualline.com/vim-cook.html

5. Opening and closing a file
You may use vi to open an already existing file by typing:
vi filename
where "filename" is the name of the existing file. If the file is not in
your current directory, you must use the full pathname.
Or you may create a new file by typing
vi newname
where "newname" is the name you wish to give the new file.
:help open

6. Closing a file
How to close a file in VIM ?
● :wq To save and quit
● :x idem, but nobody knows it
● ZZ Quick save & quit (useful using a strange lang keyboard)
● :q! To quit and witout save
● ZQ idem
:help quit

7. Modes
vi has two modes:
➢ Command Mode
the letters of the keyboard perform editing functions
(like moving the cursor, deleting text, etc.). To enter
command mode, press the escape <Esc> key.
➢ Insert Mode
the letters you type form words and sentences. By
default vi starts up in command mode.

8. Keep on Moving
The cursor is controlled with four keys: h, j, k, l.
Key Cursor Movement
----------------------------------------
h left one space
j down one line
k up one line
l right one space
When you have gone as far as possible in one direction, the cursor
stops moving and you hear a beep. For example, you cannot use l to
move right and wrap around to the next line, you must use j to move
down a line. Look at this (http://vim.wikia.com/wiki/Moving_around) for
ways to move more quickly through a file.
:help motion

9. Elementary editing
Delete a char x
Delete 3 char 3x
Delete a line dd
Insert mode i
Insert mode from next char a
Insert mode from START line I
Insert mode from END line A
Insert new next line o
Insert new line before O
Delete a line from here D
Delete this word dw
Delete word and write cw

10. Cut & Copy & Paste & ...
Copy a line yy
Cut a line D
Cut a word dw
Paste all p
Paste line before P
Cut 10 line 10dd
Paste 10 times 10p

11. Play with regexp
Using regexp with vim for all:
Comment all lines :%s/^/#/
Uncomment all :%s/^#//
Change all foo in this bar :s/foo/bar/g
Change just first foo for this line :s/foo/bar/
Change all and ask each time :%s/foo/bar/gc
Change and do case unsensitive :%s/foo/bar/gi
Search and remove all numbers :%s/[0-9]+//g
Change each double newline in a :%s/nn/r/g
single newline
:help regexp

12. Tips & Tricks
http://www.vim.org/tips
● <C­N> <C­P> : word completion in insert mode
● <C­X><C­L> : Line complete SUPER USEFUL
● :Ex : file explorer note capital Ex
● guu : lowercase line
● gUU : uppercase line
● ~ : invert case of current character
● % : Jump to open/close parenthesis ([{}])
● [ : To jump to the beginning of a C code block
●
● http://www.rayninfo.co.uk/vimtips.html
● http://www.cs.swarthmore.edu/help/vim
● http://vim.wikia.com/wiki/VimTip1
● http://vim.wikia.com/wiki/Fix_indentation
● http://vim.wikia.com/wiki/Power_of_g
● http://vim.wikia.com/wiki/Did_you_know

13. Some Vim(s)

14. TNX 2
Thanks to:
● http://www.washington.edu/computing/unix/vi.html
● http://www.vim.org
● http://www.gooooooogle.com
● http://wikipedia.org
● http://www.autistici.org/underscore
● http://linuxdaytorino.org
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