What is the significance of the “tee” command?

It reads the standard input and sends it to the standard output while redirecting a copy of what it has read to the file specified by the user.

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Mar 6th, 2005
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Navneet Kumar

Mar 16th, 2006

tee - replicate the standard output
Syntax:-tee [ -ai ] [ file ... ]
-a        Append the output to the files rather   than
           overwriting them.
-i        Ignore interrupts.
The tee utility will copy standard input to standard out-
put, 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.