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craig> computer> software> linux> vi>
tutorial: VI tutorials

Purdue VI tutorial: This document is intended to provide a general introduction to the VI editor for the beginning user. It does not provide a comprehensive coverage of all VI commands and features, but rather focuses on those commands and features which will be most useful to the beginner.
URL: http://ecn.www.ecn.purdue.edu/ECN/Documents/VI/

Vi command reference: The vi is a text editor. It is small, powerful, and standard on most UNIX systems. The vi often frustrates new users with a unique distinction between its two modes: Command Mode and Insert/Overtype Mode. This distinction, although difficult to become accustomed to for many users, provides great power and ability to the editor. Insert/Overtype Mode is designed for inserting text only. All text manipulations and cursor moving should be done from with in Command Mode.
URL: http://www.cis.udel.edu/~totten/vi/