What will typing q! at the : prompt in command mode do when using the vi editor?
To start vi:Example: > vi letter will open a new file called letter to edit, or if letter already exits, open the exiting file. Show
Command Mode vs. Insert ModeInsert mode is the mode to be in when inserting text into the file. Command mode is the mode to be in when giving commands which will move the cursor, delete text, copy and paste, save the file etc. When entering a file, vi is in command mode. To enter text, you must enter insert mode. If in insert mode, enter command mode by hitting the escape, To insert text:
To move the cursor:You must be in Command Mode to use commands that move the cursor. Each of these commands can be preceded with a Repeat Factor. Examples:
To Delete Text:The d command removes text from the Work Buffer. The amount removed depends on the Repeat Factor and the Unit of Measure you enter after d. If you delete by mistake: give the command u (undo) immediately after you give the delete command. Examples: 3dd will delete 3 lines beginning with the current line.
Viewing Different Parts of the Work Buffer:^Character means that you should hold down the Control key while striking the indicated character key.
Yanking (copy) and Putting (paste) Text:Example:3yy will yank (copy) 3 lines In the following list M is a Unit of Measure that you can precede with a Repeat Factor, n.
Changing TextExample: cw allows you to change a word. The word may be replaced by as many word as needed. Stop the change by hitting < esc >. Ending an Editing Session
Miscellaneous commands
Searching for an expressionWhen in command mode if your enter / the cursor will go to the bottom of the screen. Follow this with an expression and vi will find the next occurrence of that expression in the file. Example: /Bill will find the next occurrence of Bill. If this is followed by the command: n, the next occurrence of Bill is found. What is WQ in vi editor?:wq. Write to file and quit. :q! Quit without saving changes.
What are the vi editor commands?Here are some of the commands can be used to move around one character at a time. k : Moves the cursor up one line. j : Moves the cursor down one line. h : Moves the cursor to the left one character position.
Which keystroke will switch vi from command mode to insert mode?vi mode has two submodes: insert mode and command mode. The default mode is insert. You can toggle between the modes by pressing Esc; alternatively, in command mode, typing a (append) or i (insert) will return you to insert mode. Tables Table 4-5 through Table 4-11 describe the editing keystrokes available in vi mode.
Which command is used to save and quit the vi editor from command mode?To get into it, press Esc and then : (the colon). The cursor will go to the bottom of the screen at a colon prompt. Write your file by entering :w and quit by entering :q . You can combine these to save and exit by entering :wq .
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