Three file-viewing commands (head, tail, and less) are used to display a portion of a file. These are especially useful when you have a very large text file you want to view and you want to narrow your display of it.

Provide me one or more command syntax examples using each of the three file-viewing commands. You must provide me using at least one command option (ex. with head command you can specify the number of lines to display using "-n num" option).