File: coreutils.info, Node: tty invocation, Prev: printenv invocation, Up: Working context 19.4 'tty': Print file name of terminal on standard input ========================================================= 'tty' prints the file name of the terminal connected to its standard input. It prints 'not a tty' if standard input is not a terminal. Synopsis: tty [OPTION]... The program accepts the following option. Also see *note Common 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
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