Quit an ‘rm’ process in RStudio

I am trying to delete a ‘list’ which is about 200Mb using ‘rm’ command in RStudio.
It seems that it is still running or has been frozen.
I can’t see the red stop button that I usually see when some process is running on RStudio.
I haven’t saved the workspace and I don’t want to lose it because it was obtained after a couple of days’ work.
Is there any way that I can stop the ‘rm’ process?

Quit an ‘rm’ process in RStudio