To log out of the Unix system, at the system prompt enter the command:
If there are suspended (stopped) jobs, you will receive a message to that effect and be unable to log out. To deal with this situation, follow instructions in `help job_control'.
If you are given a message that this is not a login shell, it means you are in a subshell. If this is the case, enter control d (hold down the ctrl key while pressing the d key) to get back to the place from which you created the subshell and proceed from there. If you want to log directly out of the subshell, enter