tty (Unix)
{{Short description|Command to print the file name of the terminal connected to standard input}}
{{Other uses|TTY (disambiguation)}}
{{lowercase|title=tty}}
{{Infobox software
| name = tty
| logo =
| screenshot = File:Tty Void Linux.png
| screenshot size =
| caption = tty command on a Void Linux machine
| developer =
| released = {{Start date and age|1971|11|3}}
| latest release version =
| latest release date =
| operating system = Unix and Unix-like
| platform = Cross-platform
| genre = Command
| license =
| website =
}}
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.{{Cite web|url=https://pubs.opengroup.org/onlinepubs/9699919799/utilities/tty.html|title=tty|website=pubs.opengroup.org|access-date=2020-02-14}}{{Cite web|url=https://man7.org/linux/man-pages/man1/tty.1.html|title=tty|website=man7.org|access-date=}}
tty stands for TeleTYpewriter.{{Cite web|url=https://askubuntu.com/questions/481906/what-does-tty-stand-for|title=What does "TTY" stand for?|website=Ask Ubuntu|access-date=2020-02-14}}
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.{{Cite web|url=https://linux.die.net/man/1/tty|title=tty(1) - Linux man page|website=linux.die.net|access-date=2020-02-14}}
See also
References
{{Reflist}}
External links
- {{man|cu|tty}}
- {{man|1|tty|FreeBSD}}
- {{man|1|tty|NetBSD}}
- {{man|1|tty|OpenBSD}}
- {{man|1|tty|Solaris}}
- {{man|1|tty|die.net}}
{{Core Utilities commands}}