NAME
  cat - concatenate and print files

SYNOPSIS
  cat [-u] [file...]

DESCRIPTION
  The cat utility shall read files in sequence and shall write their contents to
  the standard output in the same sequence.

OPERANDS
  file  A pathname of an input file. If no file operands are specified, the
        standard input shall be used. If a file is '-', the cat utility shall
        read from the standard input at that point in the sequence. The cat
        utility shall not close and reopen standard input when it is referenced
        in this way, but shall accept multiple occurrences of '-' as a file
        operand.

OPTIONS
  -u  Ignored