tee(1)

     NAME
          tee - read from standard input and write to standard output
          and files

     SYNOPSIS
          tee [-ai] [--append] [--ignore-interrupts] [--help]
          [--version] [file...]

     DESCRIPTION
          This documentation is no longer being maintained and may be
          inaccurate or incomplete.  The Texinfo documentation is now
          the authoritative source.

          This manual page documents the GNU version of tee.  The tee
          command copies the standard input to the standard output and
          any files given as arguments.

          If a file being written to does not already exist, it is
          created.  If a file being written to already exists, the
          data it previously contained is overwritten unless the -a
          option is used.

        OPTIONS
          -a, --append
               Append the standard input to the given files rather
               than overwriting them.

          --help
               Print a usage message on standard output and exit
               successfully.

          -i, --ignore-interrupts
               Ignore interrupt signals.

          --version
               Print version information on standard output then exit
               successfully.