Fixing DNS resolution issues
DNS problems are one of the most common reasons a Linux system “has no internet,” even when the network itself is working. In this video, I walk through a simple, repeatable process to identify and fix DNS resolution issues without guessing or over complicating things. Everything is shown step by step in the terminal, with clear explanations along the way.
You’ll learn how to tell the difference between a real network problem and a DNS problem, how to check what your system is actually doing, and how to apply a safe, temporary fix that gets things working again. This is the same process used in real IT environments to troubleshoot laptops, servers, and virtual machines.
DNS troubleshooting is an essential skill in IT. When package installs fail, websites won’t load, or systems seem “offline,” DNS is often the root cause. Knowing how to calmly diagnose and fix it saves time and prevents unnecessary changes or rebuilds.
What you’ll learn:
• How to confirm whether a problem is DNS or networking
• How to test connectivity the right way
• How to check which DNS servers Linux is using
• How to verify DNS is working
• How to apply a simple, known-good DNS fix
If DNS has ever felt confusing or frustrating, this walk through is designed to remove that uncertainty and give you a clear process you can reuse.
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00:00 Intro
00:24 Confirm the problem
01:14 Verify basic network connectivity
01:52 Check what DNS servers the system is using
02:44 Check systemd-resolved status
03:27 view current dns configuration
04:12 Test DNS resolution directly
04:58 Using known good servers
06:49 Confirm everything works
06:59 Troubleshooting Notes
07:45 Real World Example
08:43 Next Step
08:56 Outro