Vi -

Used for advanced commands like saving and quitting. Essential vi Commands

It is guaranteed to be available on any Unix system, making it essential for system administration.

To start using vi , you only need to learn a few key commands: vi filename : Open or create a new file. i : Switch to Insert mode to start typing text. : Exit Insert mode and return to Command mode . :w : Save (write) the file. :q : Quit the editor. :wq or ZZ : Save and quit. :q! : Quit without saving changes. 2. Navigation (Command Mode) Used for advanced commands like saving and quitting

Unlike modern word processors (like Notepad), vi is , meaning the keyboard behaves differently depending on the mode you are in.

Highly productive for power users who prefer keyboard shortcuts over mouse navigation. i : Switch to Insert mode to start typing text

: Move cursor left, down, up, right (alternative to arrow keys). w : Move forward one word. b : Move backward one word. 0 (zero) : Move to the beginning of the line. $ : Move to the end of the line. 3. Editing (Command Mode) x : Delete the character under the cursor. dd : Delete (cut) the entire current line. yy : Yank (copy) the current line. p : Paste the copied or deleted text after the cursor. u : Undo the last action. Advantages

Used for navigation, deleting, copying, pasting, and saving. Almost every letter key performs an action rather than typing characters. Insert Mode: Used for entering text. :q : Quit the editor

Based on your request, this write-up focuses on , the foundational screen-oriented text editor originally developed for Unix systems. What is vi?