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Troubleshoot Service Failures upon Boot on Linux

Upon boot, the server starts any number of services and service dependencies. Errors in these services' unit files can cause the server to hang, error out, or otherwise fail to boot in a healthy state. In this lab, you'll explore a service dependency issue that is causing problems when you attempt to run `pmcd`. _This lab is not approved or sponsored by Red Hat._

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 15m
Last updated
Clock icon Sep 03, 2025

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Table of Contents

  1. Challenge

    Confirm the Issue

    Attempt to start the pmcd service, and investigate the error.

  2. Challenge

    Resolve the Problem

    Using information uncovered in the previous step, resolve the cyclical dependency.

  3. Challenge

    Start the Services

    Start the pmcd service, and confirm that the grafana-server service has also started.

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