1-4z The system does not check the values of the view and command arguments. Therefore, ensure thecorrectness of the command argument (including the correct format of command and the correctrelationship between the command and view arguments).z After the specified automatic execution time is reached, the system executes the specifiedcommand in the background without displaying any information except system information such aslog, trap and debug.z The system does not require any interactive information when it is executing the specifiedcommand. If there is information for you to confirm, the system automatically inputs Y or Yes; ifcharacters need to be input, the system automatically inputs a default character string, or inputs anempty character string when there is no default character string.z For the commands used to switch user interfaces, such as telnet, ftp, and ssh2, the commandsused to switch views, such as system-view, quit, and the commands used to modify status of auser that is executing commands, such as super, the operation interface, command view andstatus of the current user are not changed after the automatic execution function is performed.z If the system time is modified after the automatic execution function is configured, the scheduledautomatic execution configuration turns invalid automatically.z Only the last configuration takes effect if you execute the schedule job command repeatedly.Upgrading Device SoftwareDevice Software OverviewDevice software consists of the Boot ROM program and the system boot file. After the device ispowered on, the device runs the Boot ROM program, initializes the hardware, and displays thehardware information. Then the device runs the boot file. The boot file provides drivers and adaption forhardware, and implements service features. The Boot ROM program and system boot file are requiredfor the startup and running of a device. Figure 1-1 illustrates their relationship.Figure 1-1 Relationship between the Boot ROM program and the system boot file
