tty(7) tty(7)
NAME
tty - controlling terminal interface
DESCRIPTION
The file /dev/tty is, in each process, the control terminal
associated with the process group of that process. Programs
or shell sequences use it to ensure that their messages
appear on the terminal, no matter how output is redirected.
Also, programs that demand an output file name will accept
/dev/tty, so you don't have to find out what terminal they
are using.
FILES
/dev/tty
/dev/tty*
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