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tee(1)
NAME
  tee - Displays the output of a program and copies it into a file

SYNOPSIS
  tee [-ai] file...

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  tee:	XCU5.0

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

OPTIONS
  -a  Adds the output to the end of file instead of writing over it.

  -i  Ignores the SIGINT signal.

OPERANDS
  file
      Standard input is stored into, or appended to, the file specified.

      [Tru64 UNIX]  The tee command can accept up to 20 file arguments.

DESCRIPTION
  The tee command reads standard input and writes to both standard output,
  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:

  0   Successful completion.

  >0  An error occurred.

EXAMPLES
   1.  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.

   2.  To display and append to a file, enter:
	    lint program.c | tee -a program.lint

       This displays the standard output of lint program.c at the terminal
       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:

  LANG
      Provides 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
      variables contain an invalid setting, the utility behaves as if none of
      the variables had been defined.

  LC_ALL
      If set to a non-empty string value, overrides the values of all the
      other internationalization variables.

  LC_CTYPE
      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).

  LC_MESSAGES
      Determines the locale for the format and contents of diagnostic
      messages written to standard error.

  NLSPATH
      Determines the location of message catalogues for the processing of
      LC_MESSAGES.

SEE ALSO
  Commands:  cat(1), echo(1), script(1)

  Standards:  standards(5)

Index for Section 1

Alphabetical listing for T

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