TTY

Technology & Computing abbreviation · Computer

TTY
Stands forTeletypewriter (Unix terminal)
CategoriesTechnology & Computing

TTY stands for Teletypewriter (Unix terminal), a computer abbreviation.

Name Unix-like systems give to terminal devices, the text interfaces through which users type commands. The tty command prints the current terminal's device file, and Linux offers several virtual consoles, also called TTYs, reached with Ctrl+Alt and a function key.

Example: The desktop froze, so I switched to a TTY with Ctrl+Alt+F3 and restarted the display manager.

Usage notes

The name comes from teletype machines, electromechanical typewriters that served as the first Unix terminals in the early 1970s. Terminal windows today use pseudo-terminals (PTYs). Programs check whether their output goes to a TTY to decide whether to print colors and progress bars. In telecommunications, TTY means a text telephone for deaf and hard-of-hearing users.

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