ktulasi
Joined: 21 Oct 2009
Posts: 55
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 Posted: Thu Oct 29, 2009 5:41 am Post subject: Vi Editor |
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The default editor that comes with the UNIX operating system is called vi (visual editor).
The UNIX vi editor is a full screen editor and has two modes of operation:
1. Command mode commands which cause action to be taken on the file, and
2. Insert mode in which entered text is inserted into the file.
In the command mode, every character typed is a command that does something to the text file being edited; a character typed in the command mode may even cause the vi editor to enter the insert mode. In the insert mode, every character typed is added to the text in the file; pressing the <Esc> (Escape) key turns off the Insert mode.
The most basic and useful commands are
To Start vi :
Open a file
vi file1
Save a file <Esc>+<:>+w+!
Save with new name
<Esc>+<:>+w+_+file1
Quit editing, no save
<Esc>+<:>+q+!
Insert text
<Esc>+i+<input text>+<Esc>
Append text
<Esc>+a+<input text>+<Esc>
Delete text
<Esc>+x
Delete line
<Esc>+dd
Search for pattern
<Esc>+/+<input pattern>
Delete word
<Esc> + dw
Undo
<Esc> + u
Join two lines
<Esc> + J
Line number
<Esc> + <:> + nu
j or <Return>
[or down-arrow] move cursor down one line
k [or up-arrow] move cursor up one line
h or <Backspace>
[or left-arrow] move cursor left one character
l or <Space>
[or right-arrow] move cursor right one character
0 (zero) move cursor to start of current line (the one with the cursor)
$ move cursor to end of current line
w move cursor to beginning of next word
b move cursor back to beginning of preceding word
^f move forward one screen
^b move backward one screen
^d move down (forward) one half screen
^u move up (back) one half screen
^l redraws the screen
^r redraws the screen, removing deleted lines
yy copy (yank, cut) the current line into the buffer
Nyy or yNy copy (yank, cut) the next N lines, including the current line, into the buffer
i insert text before cursor, until <Esc> hit
I insert text at beginning of current line, until <Esc> hit
r replace single character under cursor (no <Esc> needed)
R replace characters, starting with current cursor position, until <Esc> hit
cw change the current word with new text,
starting with the character under cursor, until <Esc> hit
cNw change N words beginning with character under cursor, until <Esc> hit;
e.g., c5w changes 5 words
C change (replace) the characters in the current line, until <Esc> hit
cc change (replace) the entire current line, stopping when <Esc> is hit
x delete single character under cursor
Nx delete N characters, starting with character under cursor
dw delete the single word beginning with character under cursor
dNw delete N words beginning with character under cursor;
e.g., d5w deletes 5 words
D delete the remainder of the line, starting with current cursor position
dd delete entire current line |
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