- replicate the standard output
tee [-ai] [file]...
The tee utility will copy standard input to standard output, making a copy in zero or more files. tee will not buffer its output. The options determine if the specified files are overwritten or appended to.
The following options are supported.
Appends the output to the files rather than overwriting them.
The following operands are supported:
A path name of an output file. Processing of at least 13 file operands will be supported.
See largefile(5) for the description of the behavior of tee when encountering files greater than or equal to 2 Gbyte ( 231 bytes).
See environ(5) for descriptions of the following environment variables that affect the execution of tee: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH.
The following exit values are returned:
The standard input was successfully copied to all output files.
The number of files that could not be opened or whose status could not be obtained.
See attributes(5) for descriptions of the following attributes: