When diagnosing a network issue on a Linux machine (without a GUI) you find that the network settings in /etc/network/interfaces (a text-based config file) are not correct. What is an appropriate tool for editing this file?
Vi is the only option available that is a Linux text editor. Other common Linux text editors are Vim and Nano. Cat will display the contents of the file but not allow you to edit it, ifconfig will show you the interface (e.g., wireless lan, ethernet) settings or allow you to temporarily change the settings (but not permanently), and notepad is a Windows-based text editor.
vi (pronounced as distinct letters, ) is a screen-oriented text editor originally created for the Unix operating system. The portable subset of the behavior of vi and programs based on it, and the ex editor language supported within these programs, is described by (and thus standardized by) the Single Unix Specification and POSIX.The original code for vi was written by Bill Joy in 1976, as the visual mode for a line editor called ex that Joy had written with Chuck Haley. Bill Joy's ex 1.1 was released as part of the first Berkeley Software Distribution (BSD) Unix release in March 1978. It was not until version 2.0 of ex, released as part of Second BSD in May 1979 that the editor was installed under the name "vi" (which took users straight into ex's visual mode), and the name by which it is known today. Some current implementations of vi can trace their source code ancestry to Bill Joy; others are completely new, largely compatible reimplementations.The name "vi" is derived from the shortest unambiguous abbreviation for the ex command visual, which switches the ex line editor to its full-screen mode. The name is pronounced (the English letters v and i).In addition to various non–free software variants of vi distributed with proprietary implementations of Unix, vi was opensourced with OpenSolaris, and several free and open source software vi clones exist. A 2009 survey of Linux Journal readers found that vi was the most widely used text editor among respondents, beating gedit,