Final answer:
The vi editor is a command-line text editor commonly used in Unix-like operating systems. It allows users to create, edit, and manipulate text files and has features such as efficient navigation, search and replace using regular expressions, and extensibility through plugins.
Step-by-step explanation:
The vi editor is a text editor commonly used in Unix-like operating systems. It is a command-line based editor that allows users to create, edit, and manipulate text files. Some key features of the vi editor include its ability to navigate through a document efficiently using various commands, its support for regular expressions for searching and replacing text, and its extensibility through the use of plugins.