tty (Unix)
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| tty | |
|---|---|
File:Tty Void Linux.pngtty command on a Void Linux machine | |
| Initial release | November 3, 1971 |
| Repository |
|
| Engine | |
| 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
[edit | edit source]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 standard output 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
[edit | edit source]References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
External links
[edit | edit source]- – Shell and Utilities Reference, The Single UNIX Specification, Version 5 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
