I am in the process of doing testing on a backup script that will backup everyones home directories. When I run a "who" I can see the users that are logged on. How can I send these users, let say an instant message other then email to alert them that I am about ready to kick of a test backup? I dont want to have my script backup right in the middle a programmer coding. Is there a utility that I can use? The server is Mandriva 2008.1
Regards