Written 28 Aug 2026. This is a how-to, not a product card. Buy links are not tagged yet.

See if the leftover box wants a reboot

After weekly updates, check whether the leftover box is asking for a reboot before you buy a monitoring box.

Keep the leftover box updated says reboot only if the leftover box says so. This note is the quiet look that answers that. Debian and Ubuntu leave a small flag file when a reboot will finish the fixes. You are not guessing from a kernel line. You are asking the leftover box. You do not need a monitoring appliance for one flag.

Skip until the weekly habit exists

If you have never run the two update commands, start with keep the leftover box updated. If SSH from the couch is not working yet, that is SSH from the couch. Prefer this look right after an upgrade finishes, or any morning you wonder whether last week's fixes still need a restart. This note assumes you can log in from the couch.

What this is

A look, not a shopping trip. You are reading a reboot flag the leftover box already wrote. You are not buying a UPS, an N100, a mesh kit, or a monitoring box this morning. A reboot finishes some updates. A power-off for the night is different: shut down the leftover box without yanking the plug.

Ask if a reboot is needed

SSH in from the couch, then ask:

test -f /var/run/reboot-required && echo needs reboot || echo no reboot needed

If you see needs reboot, the leftover box wants a restart to finish the last fixes. If you see no reboot needed, leave it alone. Do not reboot every week on habit. Do not buy anything because the line printed once.

Optional: which packages asked

If the flag is there and you want the short list of packages that asked:

cat /var/run/reboot-required.pkgs

No file, or an empty look, is fine. The flag file is enough. Keep this note on yes or no.

If it needs a reboot

Finish with a clean restart:

sudo reboot

Wait a minute. Then is the leftover box still on?, log back in, and confirm the house jobs: after a reboot, check the leftover box still does its jobs. Failed jobs after that are see if any house jobs failed to start. Do not yank the cord for this. That is for a night you mean to power off: shut down the leftover box without yanking the plug.

What next

The weekly two commands stay keep the leftover box updated. When that habit is boring, later is let the leftover box apply weekly fixes without you (still leave automatic reboot off). How long it has been awake after a restart is see how long the leftover box has been awake. The leftover-first rule stays start with what you already have.

Skip

Skip if you have not run weekly updates yet. That is keep the leftover box updated.
Skip a reboot when the line says no reboot needed.
Skip a monitoring box, a UPS, or a new mini PC for this look.
Skip letting unattended upgrades reboot the leftover box by itself. That is still off in let the leftover box apply weekly fixes without you.
Skip a NAS for this look.

Sources

Debian Reference: the kernel (reboot-required). Debian: apt. Ubuntu: apt. Official pages only. For the weekly habit, see keep the leftover box updated. For jobs after a restart, see after a reboot, check the leftover box still does its jobs. For a night power-off, see shut down the leftover box without yanking the plug. For the login, see SSH from the couch.

Also on this topic

Keep the leftover box updatedOnce a week, give the leftover box its fixes so SSH and Pi-hole are not sitting on last year's bugs. Skip this until next week if you just finished first weekend. After a reboot, check the leftover box still does its jobsThe leftover box came back up. Confirm SSH, house ad block, and the file share still work before you buy anything. Shut down the leftover box without yanking the plugWhen you are done for the night, tell the leftover box to finish writing, then power off. Do not yank the cord. Skip this if you only need a reboot after updates. Let the leftover box apply weekly fixes without youAfter the weekly two-command habit is boring, you can let the leftover box apply those same fixes by itself. Skip this until that habit is boring. Do not let it reboot on its own. See how long the leftover box has been awakeBefore you buy a UPS or a new mini PC, see how long the leftover box has been awake. Is the leftover box still on?You left the leftover box on. This morning ads are back, or SSH hangs. Check if it is awake before you buy anything. Start with what you already haveDo not buy anything yet. Old laptop first, or a retired OptiPlex from Marketplace.