Linux Command Library
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Commands
basic
Basic
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Tips

tee

read from standard input and write to standard output and files

- Copy standard input to each FILE, and also to standard output:
echo "example" | tee [FILE]

- Append to the given FILEs, do not overwrite:
echo "example" | tee -a [FILE]

- Create a folder called "example", count the number of characters in "example" and write "example" to the terminal:
echo "example" | tee >(xargs mkdir) >(wc -c)

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
diagnose errors writing to non 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'. 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: <http://www.gnu.org/software/coreutils/> Report tee translation bugs to <http://translationproject.org/team/>

Copyright © 2016 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.

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

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