tee

tee [options ] [files ]

Duplicate the standard input; send one copy to standard output and another copy to files .

Options

-a

Append output to files .

-i

Ignore all interrupts.

Examples

Display a who listing on the screen and store it in two files:

who | tee userlist ttylist

Display misspelled words and add them to existing typos :

spell ch02 | tee -a typos