Using head we can specify how much of a text file we want to see.

Which of these do you think -2 will output here?

Raindrops on roses
Whiskers on kittens
Raindrops on roses
Whiskers on kittens 
Bright copper kettles

See that? We specify the file name after head and provide an option that specifies the number of lines to display.

Psst: if we don't provide a number, the command will display ten lines.

Might it be that the number we use refers to the number of lines we want to see?