tail:tldr:b159c

The command "tail --follow ${filename}" is used to monitor the changes made to a specific file in real-time.

Here's a breakdown of the command:

• "tail" is a command-line utility in UNIX-like operating systems that displays the last few lines of a file. It is commonly used to view log files.
• "--follow" or "-f" is an option in the tail command that enables the "follow" mode. It means that tail will actively monitor any changes made to the file and display new lines as they are added. Without this option, tail would only show the existing lines and exit.
• "${filename}" is a placeholder that represents the actual name of the file you want to monitor. You would replace it with the specific file name or path to the file you want to track.

So, when you execute the command "tail --follow ${filename}", the tail command will continuously display the new lines added to the specified file until you interrupt the command by pressing "Ctrl+C".