What is tty Linux command?

The Linux tty command shows the file name of the terminal connected to standard input. It can display the file name of the terminal you are currently using.

tty Syntax:

tty [option]

tty Options:

Option	Description
-s	Silent mode. Prints nothing, only returns an exit status.
—help	Display help information.

Parameters:

Parameter	Description
None	The tty command does not require any parameters.

tty Command Usage Examples:

Check the current tty

tty

This command displays the file name of the terminal connected to standard input.

Switch to a specific tty

sudo chvt 2

This command switches to tty2 where you can access a different virtual terminal.

Display the current console settings

stty -a

This command shows all the current settings of the terminal.

Open a new tty

sudo openvt

This command opens a new virtual terminal.

Redirect output to a specific tty

echo "Hello, World!" > /dev/tty3

This command sends the “Hello, World!” message to tty3 for output.

How do I check the terminal device associated with input?

To check the terminal device associated with input in Linux, use the following command:

tty

How can I find the full path of the terminal device?

To find the full path of the terminal device in Linux, you can use the following command:

tty -s

How do I use tty to determine if a script is being run in an interactive shell?

To determine if a script is being run in an interactive shell using bash and tty, you can use the following command:

[ -t 0 ] && echo "Interactive" || echo "Not Interactive"

How can I check if a file descriptor is associated with a terminal device?

To check if a file descriptor is associated with a terminal device in Linux using tty, you can run the following command:

tty -s <file_descriptor>

How to list all open terminals in Linux using tty command?

To list all open terminals in Linux with the tty command, you can execute the following:

ps -ef | grep -v grep | grep pts

How do I redirect output to a specific terminal device using tty in Linux?

To redirect output to a specific terminal device in Linux with the tty command, you can use the following syntax:

echo "Hello, world!" > $(tty)

How can I get the terminal device for standard error in bash using tty?

To get the terminal device for standard error in bash with tty, you can enter the following command:

tty <&2

How to get the device number and file name of the connected terminal?

To get the device number and file name of the connected terminal in Linux using tty, run the following command:

stat -c "%t %n" $(tty)

Applications of the tty command

Checking the file name of the terminal connected to standard input.
Determining the file name of the terminal connected to standard output.
Redirecting the standard output to a specific terminal device.
Monitoring the terminal device being used by a specific process.