tty (Unix)
 tty command on a Void Linux machine | |
| Initial release | November 3, 1971 |
|---|---|
| Operating system | Unix and Unix-like |
| Platform | Cross-platform |
| Type | Command |
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.[1][2]
tty stands for TeleTYpewriter.[3]
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.[4]
See also
References
- ^ "tty". pubs.opengroup.org. Retrieved 2020-02-14.
- ^ "tty". man7.org.
- ^ "What does "TTY" stand for?". Ask Ubuntu. Retrieved 2020-02-14.
- ^ "tty(1) - Linux man page". linux.die.net. Retrieved 2020-02-14.
External links
- – Shell and Utilities Reference, The Single UNIX Specification, Version 4 from The Open Group
- – FreeBSD General Commands Manual
- – NetBSD General Commands Manual
- – OpenBSD General Commands Manual
- – Solaris 11.4 User Commands Reference Manual
- – Linux User Commands Manual