• Source: Tty (Unix)

In computing, tty is a command in Unix and Unix-like operating systems to print the file name of the terminal connected to standard input.
tty stands for TeleTYpewriter.




Usage


The tty command is commonly used to check if the output medium is a terminal. The command prints the file name of the terminal connected to standard input. If no file is detected (in case, it's being run as part of a script or the command is being piped) "not a tty" is printed to stdout and the command exits with an exit status of 1. The command also can be run in silent mode (tty -s) where no output is produced, and the command exits with an appropriate exit status.




See also


Pseudoterminal
Teleprinter




References






External links


tty – Shell and Utilities Reference, The Single UNIX Specification, Version 4 from The Open Group
tty(1) – FreeBSD General Commands Manual
tty(1) – NetBSD General Commands Manual
tty(1) – OpenBSD General Commands Manual
tty(1) – Solaris 11.4 User Commands Reference Manual
tty(1) – Linux User Commands Manual

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