The subscribe and unsubscribe Commands
Both of these command utilities are specific to the CSE Linux environment. The modify your environment variables, allowing access to installed programs not located in the default binary search path. Running subscribe or unsubscribe from a Linux prompt presents an interactive interface listing all available packages. Packages to which you are subscribed with have an asterisk (*) next to them. Use h to display detailed help on the interface.
You can also run subscribe <package-name> or unsubscribe <package-name>
Changes made via the subscribe and unsubscribe commands will not take effect until you log out and back in.