What does the `tail` command do?

The tail command in Linux is used to display the last few lines of a text file. By default, it shows the last 10 lines, but you can customize this by using options. For example, tail -n 5 filename.txt will display the last 5 lines of filename.txt. It's commonly used for monitoring log files and viewing the most recent entries. Additionally, tail can be used with the -f option to follow a file in real-time, showing new lines as they are added.