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Managing and Troubleshooting System Services and Processes

In this hands-on lab, you will be investigating process activity and managing services on a development system. You use the `ps` and `top` commands to review process activity and locate the `PID` for a specific process. You will use this information to kill an active process that shouldn't be running. To ensure the process isn't restarted by the service, you will use the `systemctl` command to mask the service so it doesn't start automatically and cannot be manually started by an administrator. *This course is not approved or sponsored by Red Hat.*

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Path Info

Clock icon Beginner
Clock icon 30m
Clock icon Dec 04, 2020

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Table of Contents

  1. Challenge

    View Process Information Using the PS and TOP Commands

    • Use top to view process activity.
    • Use grep to filter ps output for mariadb.
  2. Challenge

    Cycle the Problematic Service

    • Use the systemctl command to cycle the mariadb.
    • Confirm mariadb service is running using the systemctl command.
  3. Challenge

    Identify the PID and KILL the Problematic Process

    • Use the ps command to identify the PID for the mariadb process.
    • Use the kill command to terminate the mariadb using the SIGKILL parameter.
  4. Challenge

    Stop and Mask the Problematic Service to Prevent It from Restarting

    • Check the mariadb service status using systemctl.
    • Use systemctlto stop the mariadb service.
    • Mask the mariadb service using systemctl.
    • Attempt to start the mariadb service to confirm it is properly masked.

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