TEE(1) User Commands TEE(1)

# [NAME](#NAME)

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

# [SYNOPSIS](#SYNOPSIS)

**tee** \[*OPTION*]... \[*FILE*]...

# [DESCRIPTION](#DESCRIPTION)

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

[**-a, --append**](#a,)

append to the given FILEs, do not overwrite

[**-i, --ignore-interrupts**](#i,)

ignore interrupt signals

[**-p**](#p)

operate in a more appropriate MODE with pipes

[**--output-error\[=MODE\]**](#output)

set behavior on write error. See MODE below

[**--help**](#help)

display this help and exit

[**--version**](#version)

output version information and exit

## [MODE determines behavior with write errors on the outputs:](#MODE_determines_behavior_with_write_errors_on_the_outputs:)

[warn](#warn)

diagnose errors writing to any output

warn-nopipe

diagnose errors writing to any output not a pipe

[exit](#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](#AUTHOR)

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

# [REPORTING BUGS](#REPORTING_BUGS)

Report bugs to: <bug-coreutils@gnu.org>.  
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)

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.

# [SEE ALSO](#SEE_ALSO)

Full documentation <https://www.gnu.org/software/coreutils/tee>  
or available locally via: info '(coreutils) tee invocation'

September 2026 GNU coreutils 9.12

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Document: tee(1) from coreutils 9.12-r3 (Chainguard OS)
Source: https://git.savannah.gnu.org/git/coreutils.git