What is Traditional Ex - Vi editor?

The vi editor (short for visual editor) is a classic text editor that comes standard on virtually all Unix and Unix-like operating systems. It first emerged in 1976 as part of Version 3 of the Unix operating system developed at UC Berkeley.

Vi has a modal, command-based interface - it operates in either insert mode or command mode. In insert mode, keystrokes are directly inserted into the document. In command mode, keystrokes trigger editing commands like delete, copy/paste, search/replace, etc. This modal approach, combined with vi's extensive set of keyboard shortcuts, enables highly efficient and quick editing once the user knows the commands.

Almost all keystrokes in vi invoke editor commands. For example, dw will delete a word, dd will delete a whole line, p will paste inserted text, etc. Vi allows endless customization and productivity enhancements via its scripting capability and keyboard macros.

The vi editor continues to be very popular among programmers and power users. Most Unix-like systems come with vi built-in, and even many standard Linux distributions include it as the default editor. Its keyboard-based interaction model and ubiquity across systems makes it a tool many rely on for quick editing jobs.

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