tty: Linux Commands HowTo
tty: Print filename of terminal on stdin
Print file name of terminal on standard input, print the file
name of the terminal connected to standard input. It prints `not a tty? if standard
input is not a terminal.
SYNTAX
tty [option]...
OPTIONS
-s
--silent
--quiet
Print nothing; only return an exit status.
Exit status:
0 if standard input is a terminal
1 if standard input is not a terminal
2 if given incorrect arguments
3 if a write error occurs
"Behind every great fortune there is a crime" - Honore
de Balzac
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