TEE(1) — Unix Programmer’s Manual
NAME
tee − pipe fitting
SYNOPSIS
tee [ options ] [ file ] ...
DESCRIPTION
Tee transcribes the standard input to the standard output and copies the input to the specified files.
OPTIONS
−a Appends the output to the files rather than overwriting them.
−i Ignores interrupts.
INTEGRATED SOLUTIONS 4.3 BSD — April 29, 1985