Quickly learn how to display the first few lines of a file in Linux

Quickly understand how Linux displays the first few lines of a file

In the Linux system, sometimes we need to view the first few lines of a file to quickly understand the file's content and structure. In this article, we will introduce several methods to display the first few lines of a file in Linux systems and provide specific code examples.

Method 1: head command

The head command is a command used to display the content at the beginning of the file. Display the first few lines of the file by entering the following command in the terminal:

head -n 10 filename

where the -n parameter specifies the number of lines to display, the example here is to display the file The first 10 lines of filename.

Method 2: The cat command combines the pipe character and the head command

Sometimes we want to use the cat command to output the file content to the terminal, and then use the head command to display the first few lines of the file. The code example of this method is as follows:

cat filename | head -n 10

This command first outputs the contents of the filename file to the terminal, and then passes the output to head through the pipe character command to display the first 10 lines of the file.

Method 3: sed command

The sed command is a powerful text processing tool that can also be used to display the first few lines of a file. The following is an example of using the sed command to display the first few lines of a file:

sed -n '1,10p' filename

The meaning of the command here is to extract lines 1 to 1 from the file filename 10 lines of content and output.

Through the above three methods, we can quickly understand the method of displaying the first few lines of the file in the Linux system. Choose the appropriate method according to different needs and habits to browse file content more conveniently and quickly.

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