Logging System Utilization Data on a Schedule with nmon

30 minutes
  • 4 Learning Objectives

About this Hands-on Lab

In this hands-on lab, we are going to use nmon to capture server performance statistics. The first step will be to connect to the server, install nmon, and confirm it launches. After the install has completed, we will create a log directory for nmon logging and make sure that we can write to the directory. Next, we will test the `nmon` logging command to verify it collects data and can write that data to the directory. The last step will be to create a cronjob to run the `nmon` command once a week at a specific time.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Install nmon and Confirm Functionality
  • Use apt to install the nmon package.
  • Launch nmon to confirm functionality.
Create the Log Directory and Confirm Accessibility
  • Create an nmon directory in your home directory for the log files.
  • Confirm accessibility to the directory by creating a test.txt file using the touch command.
Test the Logging Parameters and Confirm Log File Content
  • Test the nmon logging command:
    • Polling cycle: 5 seconds
    • Repeat cycle: 2 times
    • Log Directory: /home/cloud_user/nmon
  • Confirm the file was created in the directory using the ls command.
  • View the file contents using the cat command.
Create a cronjob to Run the Command on a Schedule
  • Crontab schedule: Every Tuesday, starting at 22:00 hours
  • Data Collection Cycle: Every 60 seconds
  • Repeat Cycle: 480 times (8 hours)
  • Log Directory: /home/cloud_user/nmon

Additional Resources

One of the servers you support is experience performance issues on a recurring basis. Since the performance issues are occurring after hours, it is difficult to monitor in realtime and the system logs are not providing enough detail to track down the issue. You plan to use nmon to collect performance data into a log file so you can review the details the following day and attempt to identify the source of the problem.

To capture the performance data, you will need to complete the following tasks.

  1. Install nmon and confirm functionality.
    • Use apt to install the nmon package.
    • Launch nmon to confirm functionality.
  2. Create a log directory and set permissions.
    • Create an nmon directory in your home directory for the log files.
    • Confirm accessibility to the directory by creating a test.txt file using the touch command.
  3. Test the logging parameters and confirm the log file content.
    • Test the nmon logging command:
      • Polling cycle: 5 seconds
      • Repeat cycle: 2 times
      • Log Directory: /home/cloud_user/nmon
    • Confirm the file was created in the directory using the ls command.
    • View the file contents using the cat command.
  4. Create a cronjob to run the command on a schedule:
    • Crontab schedule: Every Tuesday, starting at 22:00 hours
    • Data Collection Cycle: Every 60 seconds
    • Repeat Cycle: 480 times (8 hours)
    • Log Directory: /home/cloud_user/nmon

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