Keyhold
PayPal sandbox. Test money only.PayPal sandbox. Test money only.

PayPal sandbox. Every order, hold, capture and refund here uses PayPal sandbox test money.

fstab lists a disk that is gone

Final

Fixed. Charged $19.00.

Charged only after the owner's server answered SSH and the web check twice, at 16:45:43 and 16:45:58 UTC.

  1. Quote (done) $19.00 fixed
  2. Hold (done) approved 16:44:33
  3. Keyboard (done) locked: agent finished
  4. Probe (done) 2 of 2 passed
  5. Charged $19.00 warranty passed

Done · Charged $19.00, warranty passed

Keyboard locked: rescue doneagent finished at 16:45:43 UTC · 5 PayPal checks

Charged

$19.00captured, final

1 min 27 sfrom hold to charge

12agent turns

6 of 6warranty checks passed

How your $19.00 moved

  1. Quote: $19.00, fixed before any key

    A free look at the screen found: a bad /etc/fstab entry stops the boot in emergency mode. Screenshots only.

  2. Hold: the owner approved, PayPal held $19.00

    Nothing charged yet.

    Authorization 8B2472…364A · CREATED $19.00

  3. Keyboard: lent, then locked

    Claude typed for 12 turns while PayPal said the hold was live. Then the keyboard locked: agent finished.

  4. Probe: the owner's own check passed twice

    16:45:43 and 16:45:58, no failure between.

    ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches

  5. Charged: PayPal captured $19.00

    1 min 27 s after the hold.

    Capture 37X168…222U · COMPLETED $19.00

  6. Warranty: 6 of 6 checks passed

    Re-checked every 20 s, 6 times (compressed for the demo; the real plan is 24 hourly checks).

PayPal, read live

Read from the PayPal sandbox at 04:28:05 UTC

PayPal objects for this rescue, with PayPal's status and what it means
ObjectStatusWhat it meansAmountPayPal answeredWebhook
Order86B675…2123 COMPLETED The owner approved the hold in PayPal. $19.00 16:44:14 none for this call
Authorization8B2472…364A CAPTURED The hold became the charge. $19.00 16:44:3316:45:59 capture 16:44:46
Capture37X168…222U COMPLETED Charged $19, after the owner's check passed twice. $19.00 16:45:59final 16:46:18
Full log 53 rows
  1. Quotefstab_bad_entry T2 $19.00
  2. Quotediagnosis: a bad /etc/fstab entry stops the boot in emergency mode. Quote T2, $19.00.
  3. PayPalcreate_order with PayPal-Request-Id order-a19567da-1a6b-40c6-b17f-e81060658b6f
  4. PayPalorder 86B67576N00242123 PAYER_ACTION_REQUIRED
  5. StateQuote ready → Waiting for your PayPal approval
  6. PayPalauthorize with PayPal-Request-Id auth-a19567da-1a6b-40c6-b17f-e81060658b6f
  7. PayPalauthorization 8B247206HB288364A CREATED $19.00
  8. StateWaiting for your PayPal approval → Hold approved, lending the keyboard
  9. LockPayPal authorization 8B247206HB288364A CREATED $19.00: keyboard allowed
  10. StateHold approved, lending the keyboard → Agent at the keyboard: keyboard lent to the agent
  11. AgentI'm at the emergency mode root password prompt, and the owner supplied the password in the user's message, so I'm authorized to enter it here. I'll type it and press enter to continue past the "(or press Control-D to continue)" prompt.
  12. Agenttyped: [console password] ↵
  13. Agenttyped: cat -A /etc/fstab | cat ↵
  14. LockPayPal authorization 8B247206HB288364A CREATED $19.00: keyboard allowed
  15. WebhookPAYMENT.AUTHORIZATION.CREATED WH-2KG37580Y3940154R-8HW88340LE6604639: verified, applied
  16. AgentI'm checking the fstab entry for the data disk, planning to add nofail so boot doesn't hang if it's missing. I'll back up the file first and then edit only that line with sed. Still working on the sed edit to add nofail to that fstab line. Once it's in, I'll cat the file to check it before reloading and rebooting.
  17. Agenttyped: cp /etc/fstab /etc/fstab.keyhold-bak && sed -i '/^UUID=7d1e3c55-2b8f-4c1e-9a0d-5f2a61c0b9e4 /s/defaults,/defaults,nofail,/' /etc/fstab && cat /etc/fstab ↵
  18. AgentI've added nofail to the line, so next I'll reload the daemon, run mount -a to check it, and then reboot. The disk is currently missing, so I expect that one entry to fail, though nofail should let the rest mount cleanly.
  19. LockPayPal authorization 8B247206HB288364A CREATED $19.00: keyboard allowed
  20. Agenttyped: systemctl daemon-reload; mount -a; echo "mount-rc=$?"; findmnt / | cat ↵
  21. AgentThe mount command succeeded and root is now available, so the next step is a reboot. I'm weighing `systemctl reboot` against simply exiting emergency mode to let boot continue, and I'm leaning toward the reboot since it's the cleaner option.
  22. Agenttyped: systemctl reboot ↵
  23. LockPayPal authorization 8B247206HB288364A CREATED $19.00: keyboard allowed
  24. AgentThe system has reached graphical.target and ssh is running. Next I want to confirm a login prompt and that ssh is active. The screen doesn't show a login prompt yet, so it may have scrolled, and I'm weighing another screenshot after a moment against pressing Enter. Pressing Enter at a login prompt is harmless, so I'll take a screenshot first.
  25. AgentThe screen has gone static and the login prompt isn't showing, though the boot log reaches graphical.target and ssh has started. I'm thinking about whether to check the web page on demo-page.socket, port 80, but I can't do that from the console without logging in. Pressing enter might bring up the login prompt, so I'll try that.
  26. Agentpressed ret
  27. AgentThe login prompt is up, and the check needs me to get in first. The user gave me the root password, so I'll log in and confirm that ssh is running.
  28. LockPayPal authorization 8B247206HB288364A CREATED $19.00: keyboard allowed
  29. Agenttyped: root ↵
  30. Agenttyped: [console password] ↵
  31. Agenttyped: systemctl is-active ssh; ss -ltnp | cat; findmnt /srv/data | cat ↵
  32. AgentSSH is up and listening on port 22, and port 80 is also listening through the demo-page socket managed by systemd. The /srv/data mount is missing because the disk isn't present, but its nofail option means boot can still proceed, so I'm wrapping up here.
  33. AgentThe boot stalled in emergency mode because /etc/fstab had a line mounting UUID 7d1e3c55-2b8f-4c1e-9a0d-5f2a61c0b9e4 at /srv/data with no nofail option; that device was not present, so local-fs.target failed. I backed up /etc/fstab to /etc/fstab.keyhold-bak and added nofail to that one line only (the line is now: UUID=7d1e3c55-... /srv/data ext4 defaults,nofail,x-systemd.device-timeout=15s 0 2). Ran systemctl daemon-reload and mount -a (rc=0), then rebooted. The system reached multi-user/graphical targets and the normal login prompt. After logging in: systemctl is-active ssh reports active, sshd listens on 0.0.0.0:22 and [::]:22, and the demo page socket is listening on port 80. Note: the /srv/data disk itself is still not attached, so /srv/data is not mounted; if that data disk should be present, it needs to be checked separately.
  34. Lockkeyboard locked: the agent session ended (done)
  35. Agentdone: The boot stalled in emergency mode because /etc/fstab had a line mounting UUID 7d1e3c55-2b8f-4c1e-9a0d-5f2a61c0b9e4 at /srv/data with no nofail option; that device was not present, so local-fs.target failed. I backed up /etc/fstab to /etc/fstab.keyhold-bak and added nofail to that one line only (the line is now: UUID=7d1e3c55-... /srv/data ext4 defaults,nofail,x-systemd.device-timeout=15s 0 2). Ran systemctl daemon-reload and mount -a (rc=0), then rebooted. The system reached multi-user/graphical targets and the normal login prompt. After logging in: systemctl is-active ssh reports active, sshd listens on 0.0.0.0:22 and [::]:22, and the demo page socket is listening on port 80. Note: the /srv/data disk itself is still not attached, so /srv/data is not mounted; if that data disk should be present, it needs to be checked separately.
  36. StateAgent at the keyboard → Checking your server: the agent called finished; the owner probe decides
  37. Probepass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  38. Probepass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  39. Probepass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  40. Probepass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  41. Probestable: 2 passes 14.6691 s apart, no failure between
  42. PayPalcapture with PayPal-Request-Id cap-a19567da-1a6b-40c6-b17f-e81060658b6f
  43. PayPalcapture 37X1688089973222U COMPLETED $19.00
  44. StateChecking your server → Fixed and charged: probe passed
  45. WarrantyWarranty (judge mode, compressed): re-probed every 20 seconds, 6 times (2 minutes in all); the real plan is 24 hourly checks. Two failed checks in a row refund the full capture.
  46. WebhookPAYMENT.CAPTURE.COMPLETED WH-5RM88967HC6181058-62C51042SG7324112: verified, applied
  47. Warrantypass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  48. Warrantypass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  49. Warrantypass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  50. Warrantypass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  51. Warrantypass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  52. Warrantypass: SSH ok, page ok. ssh ok: logged in as probe; http ok: HTTP 200, sha256 matches
  53. StateFixed and charged → Warranty passed: window ended: 6 checks, never 2 failures in a row
Audit details full ids, PayPal-Request-Ids, invoice, quote, owner probe, ledger checks, timing

Ids

Rescue
a19567da-1a6b-40c6-b17f-e81060658b6f
State
WARRANTY_OK
Invoice id
keyhold-a19567da-1a6b-40c6-b17f-e81060658b6f
Order
86B67576N00242123 · intent AUTHORIZE
Authorization
8B247206HB288364A · expires 2026-12-07 16:44:32 UTC
Capture
37X1688089973222U
Refund
—
Ending
window ended: 6 checks, never 2 failures in a row

PayPal-Request-Ids: two ticks per money call

Each call is written to the outbox with its PayPal-Request-Id before it is sent, so a retry never moves money twice. PayPal's synchronous answer is the first tick; the verified webhook is the second.

Money calls and their confirmations
CallPayPal-Request-IdAPI answerWebhook
Orderorder-a19567da-1a6b-40c6-b17f-e81060658b6f ✓ 16:44:14 none for this call
Authorizationauth-a19567da-1a6b-40c6-b17f-e81060658b6f ✓ 16:44:33 ✓ 16:44:46
Capturecap-a19567da-1a6b-40c6-b17f-e81060658b6f ✓ 16:45:59 ✓ 16:46:18

Ledger checks

ok captured ≤ authorized ≤ quote, one capture at most, no void after capture, refund ≤ captured.

Diagnosis and plan

a bad /etc/fstab entry stops the boot in emergency mode

  • TIME ] Timed out waiting for device dev-disk-by\x2duuid/7d1e3c55-2b8f-4c1e-9a0d-5f2a61c0b9e4.
  • [DEPEND] Dependency failed for srv-data.mount - /srv/data.
  • [DEPEND] Dependency failed for local-fs.target - Local File Systems.
  • You are in emergency mode. After logging in, type "journalctl -xb" to view

1. At the emergency prompt, run journalctl -xb and confirm it names the device with UUID 7d1e3c55-2b8f-4c1e-9a0d-5f2a61c0b9e4 for /srv/data as missing. 2. Open /etc/fstab and find the line that mounts that UUID at /srv/data. 3. Add nofail and nobootwait to that line, or comment it out if the disk is not needed to boot. 4. Run systemctl daemon-reload, then mount -a to test the remaining fstab entries. 5. Run systemctl reboot. If the root password prompt cannot be satisfied from the console, stop and do not attempt a workaround.

Quote

Fault class
fstab_bad_entry
Tier
T2 · $19.00
Quote hash
383d40149c460ad165673272e203a95f8a25b0d0d3130f8e25ef5ffd38d885ec

Owner probe, fixed at checkout

A capture happens only after this check passes twice, far enough apart, with no failure between.

SSH login
as probe on port 32847, with a key only the probe holds
Probe key
SHA256:CcgWuPvbHnBojBASpsq+D15PKuJPkuBo/cq0ROAmp4M
Page
HTTP GET / on port 32844: the page body has sha256 429d6e1517d7805977c57314076c608c7acf30e52b93b0b5103ae57152669bc8
Spec hash
9b88f4527545bb0ce33568841b4ba6ca93e1684f2d5665015da3f3c81f8677b9
Sent as the order's custom_id.

Timing and cost

Created
2026-11-08 16:43:59 UTC
Model cost
about $0.0039
Timing
Judge mode, compressed timing. Capture after two passes at least 10 s apart, with no failure between. Warranty (judge mode, compressed): re-probed every 20 seconds, 6 times (2 minutes in all); the real plan is 24 hourly checks. Two failed checks in a row refund the full capture.
Warranty
re-checked every 20 s, 6 times (compressed for the demo; the real plan is 24 hourly checks)
Full console screen