Answer Posted / worsame abid

A Pipe is two or more commands seperated by pipe chat "|".
That tells the shell to arrange for the output of the
proceeding command to be passed as input to the following
example.

$ls |wc -l

this will mean that output of ls command will serve as
input for wc command as result we will get total number of
files in current directory.



Tee is normally used to split the output of a program so
that it can be seen on the display and also be saved in a
file ,The tee command reads standard input, then writes its
content to standard output and simultaneously copies it
into the specified file(s) or variables.

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