Detailed explanation of the use of tail command in Linux!

Linux operating system is an open source operating system with a high degree of flexibility and customizability, and is widely used in the server field. In Linux systems, tail is one of the commonly used commands, which can be used to view the content at the end of a file. This article will introduce in detail how to use the tail command in Linux.

The tail command is a commonly used command line tool in Linux and Unix systems. It is mainly used to view the content at the end of a file. By default, the tail command will display the last 10 lines of the file, and the user can also customize the number of displayed lines through parameters.

The basic syntax of the tail command is as follows:

tail [option] [file]

Commonly used options include:

　-n: Specify the number of lines to be displayed. For example, tail -n 20file.txt will display the last 20 lines of the file file.txt.

　-f: Track file changes in real time and continuously display new content. Suitable for viewing dynamically updated files such as log files.

The following are examples of some common tail commands:

　1. Display the last 10 lines of the file

tail file.txt

　2. Display the last 20 lines of the file

tail -n 20 file.txt

　3. Track file changes in real time

tail -f log.txt

　4. Display the last few lines of multiple files

tail -n 5 file1.txt file2.txt

It should be noted that the tail command operates in row units by default, but the unit can also be changed through other options, such as bytes or blocks.

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