What modes does vi have?

vi has three working modes, namely: 1. Command mode, which is the working mode entered after starting vi, and can be converted to text editing mode and last line mode; 2. Text editing mode, used for characters Edit; 3. Last line mode.

vi has three working modes: command mode, text editing mode and last line mode. The operation methods are different in different working modes.

1. Command mode:

Command mode is the working mode entered after starting vi, and can be converted to text editing mode and last line mode. In command mode, any characters entered from the keyboard are interpreted as editing commands and will not be displayed on the screen. If the characters entered are legal vi commands, vi will complete the corresponding action; otherwise vi will ring a warning.

2. Text editing mode:

Text editing mode is used for character editing. In command mode, enter i (insert command), a (append command) and other commands to enter text editing mode. Any characters entered at this time will be displayed on the screen as file content by vi. Press the Esc key to return to command mode from text editing mode.

3. Last line mode:

In command mode, press the ":" key to enter the last line mode. At this time, vi will display ":" at the bottom of the screen. " symbol year serves as the prompt for the last line mode, waiting for the user to enter relevant commands. After the command is executed, vi automatically returns to command mode.

Extended information:

Recover files:

When vi edits a file, it will generate a Temporary file, this file starts with . and ends with .swp. The file will be automatically deleted if you exit normally. If you exit unexpectedly, such as a sudden power outage, the file will not be deleted. We can choose the following command to process the next time we edit:

• OOpen for reading only, not Change the file content

• EContinue editing the file without restoring the content saved in the .swp file

• RWill restore the unsaved files since the last edit Content

• QQuit vi

• D Delete the .swp file

• Or use vi -r Filename to recover unsaved content

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