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vi Editor#

Three Modes of vi Editor#

1. Command mode (default mode)
2. Insert mode [press a in command mode (insert text after the cursor)] or [press i in command mode (insert text before the cursor)]
3. Last line mode (prepare to exit vi editor) [input :(colon in English)]

Commands in Last Line Mode#

1. :wq save and exit (note that w is for save, q is for exit, in that order, do not reverse wq)
2. :q! force exit document (i.e., do not save and exit)

Appreciating the Advantages of vi Editor#

Commands in vi Editor Command Mode#

1. yy copy current line nyy copy current n lines
2. dd delete current line ndd delete current n lines
3. p paste
4. Support for search function: /function you want to search for