This is a clone of the head system program command, but it only works for one file. Here is the man file for it that has been modified to show that it only works for one input file.
HEAD
NAME head -- display first lines of a file
SYNOPSIS head [-n count | -c bytes] [file]
DESCRIPTION This filter displays the first count lines or bytes of each of the speci- fied files, or of the standard input if no files are specified. If count is omitted it defaults to 10.
EXIT STATUS The head utility exits 0 on success, and >0 if an error occurs. (END)