Logout
When the user has finished using the system, he/she user could log out. This will avoid other people from intentionally or accidentally getting access to files. That will also make the system available for other users.
The normal way to log out is to type exit. Other way of logging out is to type the end-of-file character (typically Control +D) as given below:
# exit
# ^D
Note: It is forever safe to logout when a user no longer require working on the system.