systemd systemd-system-update-generator 8 systemd-system-update-generator Generator for redirecting boot to offline update mode /usr/lib/systemd/system-generators/systemd-system-update-generator systemd-system-update-generator is a generator that automatically redirects the boot process to system-update.target, if /system-update or /etc/system-update exists. This is required to implement the logic explained in the systemd.offline-updates7. systemd-system-update-generator implements systemd.generator7. systemd1, systemd.special7