Detailed explanation of how to view the first few lines of a file in Linux

Linux is a widely used operating system, and its command line interface provides many powerful tools to facilitate users to manage and process files. Among them, viewing the first few lines of a file is a common requirement. In this article, we will introduce in detail how to use Linux commands to achieve this function.

First of all, the main command we need to use is head. The head command is used to display the beginning of the file. The first 10 lines of the file are displayed by default. Next, we'll walk through a concrete code example to demonstrate how to view the first few lines of a file.

Suppose we have a text file named example.txt with the following content:

1. Hello, this is line 1.
2. This is line 2.
3. Here comes line 3.
4. Line 4 is right here.
5. We are at line 5 now.
6. Line 6, almost there.
7. Line 7, the end is near.
8. On line 8, almost done.
9. This is line 9.
10. Last line, line 10.

Next, we will demonstrate how to view the first few lines of the file example.txt through a specific code example:

1. View the first 5 lines of the file:

   head -n 5 example.txt

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example will be displayed. The first 5 lines of txt, the results are as follows:

2. View the first 3 lines of the file:
   head -n 3 example.txt

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example.txt will be displayed. The results are as follows:

head command to view the first few lines of the file. This method is simple and efficient, especially suitable for quickly viewing part of the file in the command line environment. It is very practical for processing text files and debugging programs.

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