Skill PathEasyMedium

Learn Linux by Fixing Broken Servers

Ivan Velichko
by  Ivan Velichko · on
Linux
Practice Linux troubleshooting on deliberately broken servers. Investigate vague failures, find the root cause, and make the system work again.
#troubleshooting#systemd#strace#shared-library#socket

This skill path is a collection of troubleshooting scenarios. Each one drops you into a real Linux VM where something is already wrong, and the symptoms are about as helpful as they usually are in real life: a vague error message, a silent crash, or no visible problem at all. Your job is to find the root cause and fix it.

Every fix you make is verified automatically, so you'll know right away whether the server is healthy again. By the end of this skill path, you'll be more comfortable with journalctl, systemctl, ss, strace, and other everyday tools of Linux troubleshooting - and you'll have a repeatable approach to an unfamiliar failure:

Observe what the system actually does, narrow down the cause, fix it, and confirm that the fix holds.

Prerequisites

  • Basic Linux command-line knowledge (navigating the filesystem, editing files, using sudo).
  • A rough idea of what a process, a service, and a network port are.

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How to Author Skill paths on iximiuz Labs

Instead of providing a subpar online editing experience, iximiuz Labs offers a helper CLI tool called labctl, allowing you to use your favorite text editor (or a full-featured IDE) to write content from the comfort of your local machine.

Install labctl CLI

curl -sf https://labs.iximiuz.com/cli/install.sh | sh

This will download and install the latest version of the labctl CLI. You only need to do this once per workstation.

Authorize labctl

labctl auth login

This will open a browser window asking you to authorize labctl to access your account. You need to do it after a fresh install of labctl and repeat it whenever the auth session expires.

Pull skill path content

labctl content pull skill-path learn-linux-by-fixing-broken-servers

This will create a local copy of the skill path content in a directory named learn-linux-by-fixing-broken-servers. You only need to do this once per skill path.

Stream your changes

labctl content push -fw skill-path learn-linux-by-fixing-broken-servers

Run this command in a separate terminal to continuously upload your changes to the server while editing the skill path in your favorite text editor or IDE.

You can also use labctl to create, list, and delete your content. Learn more about the available commands: labctl content --help