vi editor

three modes:

1. command mode
2. input mode
   
3. ex mode

• Introduction
• Conventions
• Before You Begin
• Starting the VI Editor
• Getting Out of VI
• The Two Modes of VI
• How to Type Commands in Command Mode
• Some Simple VI Commands
• Text Buffers in VI
• Cutting and Yanking
• Pasting
• Indenting Your Code and Checking
• Word and Character Searching
• Settings for VI (and EX)
• Abbreviations and Mapping Keys to Other Keys
• The EXINIT Environment Variable and the .exrc file
• Recovering Your Work When Something Goes Wrong with Your Terminal
• Warning About Using VI on the Workstations
• Summary of VI commands