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Use the cut command in Linux to better split data

Latest reply: Dec 17, 2021 01:02:29 355 1 3 0 0

Hello, everyone!

This post I want to introduce you to cut command in Linux, let's learn it together.

What's a cut?

A Unix terminal command

Split the line content and output the standard output.

The data can be divided by byte, character, or separator.

What's the use?

Let's give a simple example (not all examples) to describe what a cut is and what it can do.

Simplified output, eliminating redundant interference information

For example, in this log, lines may be folded. In addition, assume that the information in the 04-19 18:26:55.605 22750 22883 W column is interference information.

Run the cut command to delete the redundant information.

Split by byte (cut -b)

Split by byte position

Split by byte interval

Split by byte position

By character

When we split by character, we encounter some problems, such as Chinese (one Chinese occupies three bytes).

However, if both Chinese and English exist, it is more troublesome. Fortunately, there is a method of splitting by character (cut -c).


Split by separator (cut -d)

attention

  • The preceding example uses the echo and pipe method.

  • All of the above examples can be used in a form similar to the addition of files.

  • For example, cut -b 1 test_cut_file.txt,   cut -c 1 test_cut_file.txt,

    cut -d "|" -f 1 test_cut_file.txt.

That's all, thanks!

The post is synchronized to: Huawei Cloud Computing Case

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olive.zhao
Admin Created Dec 17, 2021 01:02:29

Thanks for your sharing!
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