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How did you close the turtlesim?

When I did the tutorial I noticed that if I close the turtlesim with Ctrl+C from the console the node still remains open and is listed in 'rosnode list'. If you close the turtlesim by closing the window with the simulation, it properly closes (no more node listed in rosnode).

It could be that the process dies to fast when you use Ctrl+C so it does not perform the cleanup routines. I've seen similar behavior with other nodes as well, when they are killed with Ctrl+C but don't handle that properly.

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