tee -- clone output stream

DESCRIPTION

The tee command clones an output stream. It copies the standard input to each output file as well as to the standard output.

Options

-a: appends to (rather than overwrites) each output file.
-i: ignores interrupt signals, making it suitable for use as a background process. Since Windows systems do not support signals, this option does nothing on those systems.

EXAMPLES

prog | tee file

This runs the program prog and pipes the program's standard output into tee. As a result, tee writes the output to both the standard output and the specified file.

DIAGNOSTICS

Possible exit status values are:

0

Successful completion.

1

Failure due to any of the following:

— out of memory

— I/O error reading or writing to a file

— error creating an output file

— error opening an output file for append

2

Failure due to invalid command line option.

PORTABILITY

POSIX.2. x/OPEN Portability Guide 4.0. All UNIX systems. Windows 8.1. Windows Server 2012 R2. Windows 10. Windows Server 2016. Windows Server 2019. Windows 11. Windows Server 2022.

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tee
clone output stream

Command

SYNOPSIS