Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...
In computing, a command is a directive to a computer program acting as an interpreter of some kind, in order to perform a specific task. Most commonly a command is a directive to some kind of command line interface, such as a shell....
that prints to standard output the name of the terminal
Computer terminal
A computer terminal is an electronic or electromechanical hardware device that is used for entering data into, and displaying data from, a computer or a computing system...
connected to standard input. The name of the program comes from teletypewriter
Teleprinter
A teleprinter is a electromechanical typewriter that can be used to communicate typed messages from point to point and point to multipoint over a variety of communication channels that range from a simple electrical connection, such as a pair of wires, to the use of radio and microwave as the...
, abbreviated "TTY".
When the program runs, it will output something like this:
$ tty
/dev/pts/4
In computing, a process is an instance of a computer program that is being executed. It contains the program code and its current activity. Depending on the operating system , a process may be made up of multiple threads of execution that execute instructions concurrently.A computer program is a...
A computer terminal is an electronic or electromechanical hardware device that is used for entering data into, and displaying data from, a computer or a computing system...
getty, short for "get teletype", is a Unix program running on a host computer that manages physical or virtual terminals . When it detects a connection, it prompts for a username and runs the 'login' program to authenticate the user....
The Unix stty command is used for changing the settings of a Unix computer terminal. This command is used to change keystrokes, irregular character handling, and more. Stty gives a full set of features that are also available in ncurses for programmers but simplifies it by building it in to a...
In some operating systems, including Unix, a pseudo terminal is a pseudo-device pair that provides a text terminal interface without an associated device, such as a virtual console, computer terminal or serial port...
