Administration information is kept in this directory. Logins-who logged on when and for how long-are also kept here. Messages output to the console, system crashes and accounting information for each user are kept in specific files that grow continuously.
The system administrator can monitor which commands are most often used by using databases from this directory. He/she may find out how much CPU time a specific user uses, even the commands used by specific users (if the necessary configurations are made).
The system administrator may or may not choose to keep accounting and administration data.