I was done with the compilation and was going to remove the *.o object files.
A `rm *.o` would do the job.
In my keyboard layout, the * character needs a shift, and the > character is the shifted period . (see image)
I kept the shift pressed from the asterisk * when I was going to press the period .
Thus, I typed `rm *>o`
This removes everything and sends the output of rm to a file named o
My rm is an alias to 'rm -r'.
I ran this at $HOME.