tee(1)

NAME

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

SYNOPSIS

tee [OPTION]... [FILE]...

DESCRIPTION

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

-a, --append: append to the given FILEs, do not overwrite

-i, --ignore-interrupts: ignore interrupt signals

-p: operate in a more appropriate MODE with pipes

--output-error[=MODE]: set behavior on write error. See MODE below

--help: display this help and exit

--version: output version information and exit

MODE determines behavior with write errors on the outputs:

warn: diagnose errors writing to any output

warn-nopipe: diagnose errors writing to any output not a pipe

exit: exit on error writing to any output

exit-nopipe: exit on error writing to any output not a pipe

The default MODE for the -p option is 'warn-nopipe'. With "nopipe" MODEs, exit immediately if all outputs become broken pipes. The default operation when --output-error is not specified, is to exit immediately on error writing to a pipe, and diagnose errors writing to non pipe outputs.

AUTHOR

Written by Mike Parker, Richard M. Stallman, and David MacKenzie.

REPORTING BUGS

Report bugs to: <[email protected]>.
Report any translation bugs to: <https://translationproject.org/team/>.
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
General help using GNU software: <https://www.gnu.org/gethelp/>

COPYRIGHT

Copyright © 2026 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://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.