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How to get tty number displaying in the screen.
Example, I run a program in module by cron.(automatically)
But I want to get the tty number that displayed in the monitor,
in the program that executed by cron.
I want a command to get tty number that displayed in screen from another tty/terminal.
For another example, /dev/tty1 is displayed on the machine1 screen.
I connect to machine1 from machine2 by telnet.
(tty number is /dev/pts/0)
I want to get tty number that displayed on the machine1 screen by a command.
(in this example will be /dev/tty1)
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