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This article introduces the relevant knowledge of "what are the vi shortcuts in Linux". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Vi operation, it can be said that basically, every key position around the keyboard has its own meaning.

(1) Open vi if you do not enter I, copy-paste characters will result in a few characters missing in front of you.

For example,

> vi test.txt

This is a test file.

At this point, copy the characters "this is a test file". At the beginning of the file, press "shift" and "insert". The file test.txt shows that this is truncated.

S is a test file.this is a test file.

If you enter I and execute "shift" and "insert" again, it will be normal this time, that is, if you need to copy-paste, just to be on the safe side, enter I and then perform the paste operation

This is a test file.this is a test file.

(2) vi editing is completed and there are two exit modes.

To save exit, you can enter ZZ.

Do not save the exit, you can enter ZQ.

In order to improve efficiency, you can use right-hand shift and left-hand Zmax Q in one go.

(3) batch editing

If you need to add the string "sqlplus" to the header of each line of the file, you can execute

:% s / ^ / sqlplus

If you want to change the first a character to b in the following text

This is a test file.this is a test file.

Can be executed

:% s@a@b

If you want to change all a to b, you can execute the

:% s@a@b@g

If you need to count the number of times the a character appears, you can execute

:% s/a//gn

Hint

This is a test file.this is a test file.

2 matches on 1 line

String is also supported. Counting the number of test occurrences can be executed.

:% s/test//gn

Hint

This is a test file.this is a test file.

2 matches on 1 line

(4) find location characters

One line of text, to find out the position of the "a" character

This is a test file.this is a test file.

Can be executed

Fa

Where f represents find,a to represent the character information to be retrieved. Similarly, if you want to find b, you can use fb.

Fb

In addition to characters, characters like "(" also support

F (

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