replaced quotation mark

rstudio1.md

@@ -132,7 +132,7 @@ your session. Do not forget to include your username.
 If you have problems to resume a old session and get the message `Error occurred during transmission` you might need to remove the old session data, which is located in the `~/.rstudio` folder. Usually it is sufficient to remove the sessions folder. The command via `ssh`:
 
 ```bash
-ssh ab12cdef@rstudio1.idiv.de 'rm -r ~/.rstudio/sessions/`
+ssh ab12cdef@rstudio1.idiv.de 'rm -r ~/.rstudio/sessions/'
 ```
 
 If you can not access the machine via ssh please [ask the