tee(1)tee(1)NAMEtee - Displays the output of a program and copies it into a file
SYNOPSIStee [-ai] file...
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
tee: XCU5.0
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
OPTIONS
Adds the output to the end of file instead of writing over it. Ignores
the SIGINT signal.
OPERANDS
Standard input is stored into, or appended to, the file specified.
[Tru64 UNIX] The tee command can accept up to 20 file argu‐
ments.
DESCRIPTION
The tee command reads standard input and writes to both standard out‐
put, and each specified file.
The tee command is useful when you wish to view program output as it is
displayed, and also want to save it in a file. The tee command does not
buffer output, so you may wish to pipe the output of tee to more if
more than one full screen of data is anticipated.
NOTES
If a write to any file fails, the exit status of tee will be non-zero.
Writes to all other specified files may be successful, and operation
will continue until standard input is exhausted.
EXIT STATUS
The following exit values are returned: Successful completion. An
error occurred.
EXAMPLES
To view and save the output from a command at the same time, enter:
lint program.c | tee program.lint
This displays the standard output of the command lint program.c
at the terminal, and at the same time saves a copy of it in the
file program.lint. If program.lint already exists, it is deleted
and replaced. To display and append to a file, enter: lint pro‐
gram.c | tee-a program.lint
This displays the standard output of lint program.c at the ter‐
minal and at the same time appends a copy of it to the end of
program.lint. If the file program.lint does not exist, it is
created.
ENVIRONMENT VARIABLES
The following environment variables affect the execution of tee: Pro‐
vides a default value for the internationalization variables that are
unset or null. If LANG is unset or null, the corresponding value from
the default locale is used. If any of the internationalization vari‐
ables contain an invalid setting, the utility behaves as if none of the
variables had been defined. If set to a non-empty string value, over‐
rides the values of all the other internationalization variables.
Determines the locale for the interpretation of sequences of bytes of
text data as characters (for example, single-byte as opposed to multi‐
byte characters in arguments). Determines the locale for the format
and contents of diagnostic messages written to standard error. Deter‐
mines the location of message catalogues for the processing of LC_MES‐
SAGES.
SEE ALSO
Commands: cat(1), echo(1), script(1)
Standards: standards(5)tee(1)
