tee

tool, operating system A Unix command which copies its

standard input to its standard output (like cat) but

also to a file given as its argument. tee is thus useful in

pipelines of Unix commands (see plumbing) where it

allows you to create a duplicate copy of the data stream.

E.g.

egrep Unix Dictionary | tee /dev/tty | wc -l

searches for lines containing the string "Unix" in the file

"Dictionary", prints them to the terminal (/dev/tty) and

counts them.

Unix manual page: tee(1).

[Jargon File]

(1996-01-22)