Vi Editor
The VI editor
The standard Unix/Linux editor
-Now we have vim-improved with move feature.
-When Vi is used system invokes ‘Vim’ because vi is defined alias to vim.
Starting:
# Vi filename
(Open an existing file or editing or a new file is created if the current buffer is saved)
Three operating modes of vi:
1.Command Mode: All the vi command and cursor movement key-strokes can be used. Command such as copying, pasting (put), undo, redo is run is command mode
2.Insert Mode: Actually whatever we want to write from the keyboard to the file is done in this mode. Simply insert mode takes input to the file.
3. Execution Mode: Searching for text, saving, quitting etc is done from here normally followed by (/ or :)
Note: 1. Use: set nu (or number) to display the line number)
2 Use: set nonu (to hide line number)
3. To use color full text in vi this package should be installed
# rpm -q vim-enhanced
INSERT:
a- Insert after the cursor
i- Insert before the cursor
o- Insert to a line below
A= Append to the end of line
I= Insert at the beginning of the file
O= Insert to a line above
Copy, Paste, Delete, Undo, Redo
——————————–
yy – to copy the current line
3yy- copies 3 lines below the cursor position
p – Put below (paste) below the line.
P – Paste above the line
dd – Deletes the current line
5dd -Deletes 5 lines below the cursor
u – Undo the recent change
U – Undo the changes to present line
Ctrl+r -redo
Execution Mode:
:w – write but stay in the buffer.
:q – quit q! (Forcefully quit the buffer)
:wq – write and quit
:x ,, ,, ,,
zz – from command mode.
:wq /var/test (saves in different location)
:r /etc/hosts (opens different file in the same buffer)
:r !cal , :!date – to execute commands
/ and enter searching word to find
eg. /Linux (text -forward
? And enter searching word to find (backward)
:set ignorecase or set ic (it igone the text case)
:set noic (to disable case)
n= next search in same
N= Next search in reverse direction