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.

−a, −−append

append to the given FILEs, do not overwrite

−i, −−ignore−interrupts

ignore interrupt signals

−p, −−output−error[=MODE]

behavior on write error. See MODE details below


display this help and exit


output version information and exit

MODE determines behavior with write errors on the outputs:


diagnose errors writing to any output


diagnose errors writing to any output not a pipe


exit on error writing to any output


exit on error writing to any output not a pipe

The default MODE for the −p option is 'warn−nopipe'. 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.


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


GNU coreutils online help: <>

Report tee translation bugs to <>


Full documentation at: <>

or available locally via: info '(coreutils) tee invocation'


Copyright © 2015 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>.

This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.