A utility command in Linux to view a portion of file content. It can be used to view the beginning, the end or specific line of the file.
General syntax for tail command:
$ tail [OPTION...] [FILE...]
Display the exact number of lines
tail -n [number] [file]
Using this option allows you to get the tail command to produce output that will display a certain number of lines in a file.
Example: Displaying the last three lines of the example.txt file.
Display lines starting from a specific line number
tail +[number] [file]
The command with the + sign outputs data starting from the specified line number.
Example: Using the tail command to print all lines after the first four lines of the example.txt file.
Display multiple files
tail [file1] [file2]
Use this command to display the data of multiple files at the same time.
Example: Displaying both files new1.txt and new2.txt using the tail command.
Output a certain number of bytes
tail -c [bytes] [file]
To display a specific number of bytes in a text file, use the -c option.
Example: This command displays the last 36 bytes of the example.txt file.
Use multiple commands at once
tail [file] | [other_command]
Use the tail command with pipes | to use it in conjunction with another command.
Example: Using the sort command with the tail command to display and sort the contents of the example.txt file alphabetically.
Monitor files in real-time
tail -f [file]
The -f option is used to track file changes. When new log entries are added to the log file, it updates the display in the terminal window.
Example: Displaying the last changes of the auth.log file in the terminal.
The post How to Use the Tail Command in Linux appeared first on Hongkiat.
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