tee − read from standard input and write to standard output and files
tee [OPTION]... [FILE]...
Copy standard input to each FILE, and also to standard output.
append to the given FILEs, do not overwrite
ignore interrupt signals
display this help and exit
output version information and exit
If a FILE is −, copy again to standard output.
Written by Mike Parker, Richard M. Stallman, and David MacKenzie.
Report tee bugs to bug−coreutils AT gnu DOT org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report tee translation bugs to <http://translationproject.org/team/>
Copyright © 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
The full documentation for tee is maintained as a Texinfo manual. If the info and tee programs are properly installed at your site, the command
info coreutils 'tee invocation'
should give you access to the complete manual.