A pre/post backup action is an action performed immediately before or after a backup is created.
These actions can either be: a system shutdown, a user logoff, a system suspension (this will either hibernate or sleep the machine depending on the system configuration), a rush activity or a command with optional arguments.
A command in the context of pre/post backup actions is similar to the command you would type in the command (cmd.exe) application in Windows.
For example, if you wish to run a program as a pre/post backup action you would enter the command, with its switches/options in much the same way as you would in the Windows command application.
Advanced post backup actions
These are post-backup command actions that not only include the application to execute and its switches/options but also additional internal IvyBackup switches. A few switches that are valid are: