How is the tail command used?

The tail command is used to display the last part of a file. By default, it shows the last 10 lines of the specified file. Here are some common usages:

1. Basic usage:

   tail filename.txt

2. Display a specific number of lines:
   To show the last 20 lines:

   tail -n 20 filename.txt

3. Follow a file in real-time:
   To continuously monitor a file for new lines (useful for log files):

   tail -f filename.txt

4. Combine options:
   You can combine options, for example, to show the last 5 lines and follow the file:

   tail -n 5 -f filename.txt

Feel free to ask if you need more specific examples or explanations!