5. vi editor

Apr 13, 2024#CentOS7学习笔记135

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The vi editor has three modes: command mode, input mode, and last line mode. Last line mode allows for saving and exiting vi editor with commands like :wq for save and exit, and :q! for forceful exit without saving. Vi editor also has commands in command mode like yy for copy, dd for delete, and / for search function.

vi Editor#

Three Modes of vi Editor#

Command mode (default mode)
Insert mode [Press a in command mode (insert text after the cursor)] or [Press i in command mode (insert text before the cursor)]
Ex mode (prepare to exit vi editor) [Enter : in command mode]

Ex Mode Commands#

:wq Save and exit (note that w is for save, q is for exit, in that order, wq cannot be reversed)
:q! Force exit document (i.e., do not save and exit)

Appreciating the Advantages of vi Editor#

vi Editor Command Mode Commands#

yy Copy current line nyy Copy current n lines
dd Delete current line ndd Delete current n lines
p Paste
Support for search function: /text_to_search