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I'm working with the graphical terminal application on Ubuntu 19.10. This was a homework question and I've tried several Google searches but to no avail. Can someone help me understand the following answer?

A: It normally reads from a tty device such as /dev/pts/0 or similar.

The closest resource I could find on this topic is at the following link here but suppose I do not know anything about what are tty then how can I possibly answer the above question ?

Thanks in advance.

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