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.

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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