VI editor has three modes of operations
- Command Mode
- Insert mode
- Ex Mode (Extended Command Mode)
Insert Mode
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I – Insert the text at the current cursor position.
l – Insert the text in beginning of a line
a – Adds the text after the current cursor position
A – Adds the text at the end of a line
o – Insert the text one line below current cursor position
O – Insert the text one line above current cursor position
Ex mode
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:q – Quit without saving
:q! – Quit forcefully without saving
:w – Write (save)
:wq – Save and quit
:wq! – Save and quit forcefully
:se nu – sets line numbers
:se nonu– Remove line numbers
:84 – The cursor goes to line 84
Command Mode
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dd – Deletes a line
ndd – Deletes ‘n’ lines
yy – Copies a line
nyy – Copies ‘n’ lines
p – Put (pastes the deleted or copied text)
u – Undo(you can undo 1000 times)
G – Moves the cursor to the last line of the file
