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Viewing Service Logs in Linux

Working with system logs is one of the most common tasks a Linux service administrator performs. Knowing where to find these logs and how to parse them into just the information you need saves time and effort in troubleshooting and resolution. In this hands-on lab, we will practice pulling data from the logs of a web server.

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Path Info

Level
Clock icon Beginner
Duration
Clock icon 45m
Published
Clock icon Jul 17, 2019

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Table of Contents

  1. Challenge

    Attempt to `curl` the Address on the Local Host

    1. Run the following command:

      curl -I localhost

  2. Challenge

    Determine How Many Times 10.0.1.10 Has Accessed the Website

    1. Run the following command:

      sudo cat /var/log/httpd/access_log | grep -E "^10.0.1.10" | wc -l

  3. Challenge

    Attempt to Reach the Web Server via `http://PUBLIC_IP/index.html`

    1. Run the following command:

      sudo tail -f /var/log/httpd/access_log

    2. Attempt to reach the website via public IP (not 10.0.1.10) from your computer as http://PUBLIC_IP/index.html.

  4. Challenge

    Find the New Entry in the Log

    1. Run the following command to view the entry that was appended to the end of the log:

      sudo tail -f /var/log/httpd/access_log

      Note the "200" after "HTTP/1.1"; this signifies a valid destination.

  5. Challenge

    Attempt to Reach the Web Server via `http://PUBLIC_IP/server.html`

    1. While running tail on the access log, attempt to reach the /server.html path:

      curl http://PUBLIC_IP/server.html

      Note the 404 status code; this signifies the path did not resolve to a valid page.

A Cloud Guru - Labs - Viewing Service Logs in Linux
Author
A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

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.

Provided environment for hands-on practice

We will provide the credentials and environment necessary for you to practice right within your browser.

Guided walkthrough

Follow along with the author’s guided walkthrough and build something new in your provided environment!

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On average, you retain 75% more of your learning if you get time for practice.

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