I am getting a new microSD flash ready for deploying a large number of BeagleBones, Blacks and Greens. There's a new-ish u-boot feature that is required for this, but I can't know in advance what version of u-boot is present on the eMMC of these 'Bones. So, I have a small service that runs "After=local-fs.target syslog.target" which checks the boot loader, and upgrades it if needed. Now, I want to cause an immediate (ish) reboot. My attempts to use /sbin/reboot and /sbin/shutdown (and variants on nohup /sbin/shutdown) from this service have not succeeded. Is there a way to do this?

  • Are you just looking for "systemctl reboot" ? – bgregs Dec 18 '18 at 15:42

I got what I needed using /sbin/reboot -f -f (two --force options).

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