Summary of Linux vi command knowledge points and usage

$ vi myfile

: w filename # (Enter "w filename" to save the article with the specified file name filename)

: wq #(Enter "wq", save and exit vi)

: q! #(Enter q! to exit vi without saving)

Press "ctrl" + "b": the screen moves one page back.

Press "ctrl" + "f": the screen moves forward one page.

Press "ctrl" + "u": the screen moves half a page back.

Press "ctrl" + "d": the screen moves half a page forward.

Press the number "0": move to the beginning of the article.

Press "G": Move to the end of the article.

Press "$": move to the end of the line where the cursor is located.

Press "^": Move to the beginning of the line where the cursor is located

Press "w": the cursor jumps to the beginning of the next word Press "e": the cursor jumps to the end of the next word Press "b": the cursor returns to the beginning of the previous word Press "#l": the cursor moves to the #th position in the line, such as: 5l,56l.

「x」: Each time you press it, it will delete the character "behind" the cursor.

「#x」: For example, 「6x」 means to delete the 6 characters "after" the cursor position.

「X」: Capital X. Each time you press it, it deletes the character "before" the cursor.

「#X」: For example, 「20X」means to delete the 20 characters "before" the cursor position.

「dd」: Delete the line where the cursor is located.

「#dd」: Delete # lines starting from the line where the cursor is located

"yw": Copy the characters from the cursor to the end of the word into the buffer.

 「#yw」: Copy # words to the buffer 「yy」: Copy the line where the cursor is located to the buffer.

 「#yy」: For example, 「6yy」means to copy 6 lines of text "down" from the line where the cursor is located.

 "p": Paste the characters in the buffer to the cursor position. Note: All copy commands related to "y" must be used in conjunction with "p" to complete the copy and paste functions.

「r」: Replace the character where the cursor is.

"R": Replace the character where the cursor is until the "ESC" key is pressed.

"u": If you execute a command by mistake, you can immediately press "u" to return to the previous operation. Press "u" multiple times to execute multiple replies.

"cw": change the word where the cursor is to the end of the word "c#w": for example, "c3w" means change 3 words

"ctrl" + "g" lists the line number of the line where the cursor is located.

「#G」: For example, 「15G」 means moving the cursor to the beginning of the 15th line of the article.

「set nu」: After entering 「set nu」, the line number will be listed in front of each line in the file.

「#」: The 「#」 sign represents a number. Enter a number after the colon and press Enter to jump to that line. For example, enter the number 15 and press Enter to jump to the 15th line of the article.

「/Keyword」: Press the 「/」 key first, then enter the characters you want to find. If the keyword found the first time is not what you want, you can keep pressing 「n」 until you find the keyword you want.

"?Keyword": Press the "?" key first, then enter the characters you want to find. If the keyword found the first time is not what you want, you can keep pressing "n" until you find the keyword you want.

"w": Enter the letter "w" after the colon to save the file.

"q": Press "q" to exit. If you cannot leave vi, you can press "q" followed by a "!" to force exit vi.

"qw": It is generally recommended to use it together with "w" when leaving, so that you can save files when exiting.

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w filename Store the file being edited as filename

wq filename saves the file being edited to filename and exits vi

q! Abandon all changes and exit vi

set nu displays the line number / or ? Search, enter the content to be searched after / n is used together with / or ?. If the content to be searched is not the keyword you want to find, press n or continue searching backward (used with /) or forward (used with ?) until it is found.