Troubleshoot Service Errors on Start

1.5 hours
  • 2 Learning Objectives

About this Hands-on Lab

In this exercise, you will troubleshoot and resolve service errors upon start of the `pmcd` service.

*This course is not approved or sponsored by Red Hat.*

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Resolve the startup issue with pmcd.

Attempt to start the pmcd service:

systemctl start pmcd

If the service fails to start, take a look at the details:

systemctl status -l pmcd

Note the "Drop-In" file /etc/systemd/system/pmcd.service.d/dependency.conf.

View the contents of this file and note any directives referencing other services:

cat /etc/systemd/system/pmcd.service.d/dependency.conf

Attempt to start the pmlogger service:

systemctl start pmlogger

If the service won’t start, perform the same exercise as above with pmcd.

Resolve the cyclical dependency by modifying the pmcd drop-in file from After=pmlogger.service to Before=pmlogger.service.

Start the pmcd service.

Configure pmcd to start by default.

Enable pmcd to startup upon reboot:

systemctl enable pmcd

Additional Resources

Another administrator has escalated an issue regarding startup of the pmcd service. They are unable to successfully start the service.

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Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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