What does TTY mean in the unix ps command?

Question

When I run PS one of the columns output is TTY. What does this mean? In particular, how does as value of \"??\" compare with \"ttys000\"?

I ask because I have a Java p

Answer 1

A TTY is a computer terminal. In the context of ps, it is the terminal that executed a particular command.

The abbreviation stands for "TeleTYpewriter", which were devices that allowed users to connect to early computers.

In relation to your situation, the jar creates a virtual terminal named 'ttys000' but the IDE does not attach to a virtual terminal to execute the command.