Which command do you use to display the messages seen during the last system boot?

The `show system boot-messages` command is specifically designed to display the console output and kernel messages captured during the last boot cycle of the Junos OS device. This provides critical information about the system's startup sequence and any encountered issues.

`show chassis messages` displays system log messages related to chassis events, but not specifically the boot messages.

`show file system boot-messages` is not a valid Junos OS command for displaying boot messages.

`show boot-log messages` is not a standard Junos OS command for this purpose.