You can use the reboot command to initiate updates from a QNX Neutrino terminal.
The system generates the manifest file in /var/swud. Next, the partial-shutdown utility, downsize, terminates all nonessential processes and then applies the update, displaying the progress in a progress bar on the screen:
The system then reboots. If the update is successful, the system will reboot back into the HMI. If the update is interrupted by, say, a board reset, the system will attempt to reboot again and to reapply the update.