.. include:: ../header.txt

.. _tee:

:command:`tee`
===========================

.. index:: tee
.. program:: tee
.. describe:: tee

    Copy standard input to each FILE, and also to standard output.

SYNOPSIS

    :command:`tee` [-a] [FILE]...

OPTIONS

    .. option:: -a, --append

       append to the given FILEs, do not overwrite

:command:`tee` is useful for debugging complex pipeline commands and for
achieving intermediate results.

EXAMPLE

::

    $ who | tee who$(date +"%F-%T").txt | sort