tee - Displays the output of a program and copies it into a file
tee [-ai] file...
Interfaces documented on this reference page conform to industry standards as follows:
tee: XPG4, XPG4-UNIX
Refer to the
reference page for more information
about industry standards and associated tags.
Adds the output to the end of
instead of writing over it.
Standard input is stored into, or appended to, the file specified.
The tee command reads standard input and writes to both standard output, and each specified file.
command is useful when you wish to view program
output as it is displayed, and also want to save it in a file. The
command does not buffer output, so you may wish to pipe the
if more than one
full screen of data is anticipated.
If a write to any
fails, the exit status
will be non-zero. Writes to all other specified
files may be successful, and operation will continue until standard input
The following exit values are returned:
An error occurred.
To view and save the output from a command at the same time, enter: lint program.c | tee program.lint
The following environment variables affect the execution of
Provides a default value for the internationalization variables
that are unset or null. If
is unset or null, the corresponding value from the default locale is used.
If any of the internationalization variables contain an invalid setting, the
utility behaves as if none of the variables had been defined.
If set to a non-empty string value, overrides 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
multibyte characters in arguments).
Determines the locale for the format and contents of diagnostic
messages written to standard error.
Determines the location of message catalogues for the processing
Commands: cat(1), echo(1), script(1)