Provided by: 9base_6-7build1_amd64 

NAME
tee - pipe fitting
SYNOPSIS
tee [ -i ] [ -a ] files
DESCRIPTION
Tee transcribes the standard input to the standard output and makes copies in the files. The options are -i Ignore interrupts. -a Append the output to the files rather than rewriting them.
SOURCE
/src/cmd/tee.c TEE(1plan9)