OneLinersCommand workbench
Verified diagnostic signature

A systemd unit failed, was rate-limited, missing, or blocked by a dependency.

Match output from systemd, understand the likely cause, then continue with sourced, read-only checks.

Confidence
high
Platforms
linux
Verified
2026-07-24
Recognized output

Signature matched locally

Dependency failed for

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Likely causes

What usually produces this signal

  1. Application exit
  2. Invalid or missing unit
  3. Dependency failure
  4. Repeated restart loop
Safe next checks

Collect evidence before changing the system

01

List failed systemd services

systemctl --failed

The output matches the expected target and exits without an error.

02

Print status details for every failed systemd unit

systemctl --failed --no-legend | awk '{print $1}' | xargs -r systemctl status --no-pager --lines=<lines>

The output matches the expected target and exits without an error.

03

Read one service log for the last hour with precise timestamps

journalctl -u <service> --since '1 hour ago' -o short-iso-precise --no-pager

The output matches the expected target and exits without an error.