show system image
This command identifies the various software versions that are installed and running on the system.
Example: show system image
$OS_PROMPT$ show system image
The system currently has the following images installed:
1: 1912g.11041730
2: 2012.12090045 (default boot) (running image)
The (default boot)
keywords indicate which software image the system will run if the device is rebooted.
The (running image)
keywords indicate which software image is currently being run on the system you are logged into.