headOutput the first part of files. See also:
tail. More information: https://keith.github.io/xcode-man-pages/head.1.html.
head {{path/to/file}}
head {{[-5|--lines 5]}} {{path/to/file1 path/to/file2 ...}}
n lines of a file:head {{[-n|--lines]}} {{n}} {{path/to/file}}
n bytes of a file:head {{[-c|--bytes]}} {{n}} {{path/to/file}}