Figuring Out Name Resolution! (Linux+ Objective 1.5.2)
Linux comes with tools like dig, nslookup, hostnamectl, resolvectl, etc. Several of them do similar tasks, but it's important to understand what they're actually doing, and how DNS queries are executed on a system.
We learn about nsswitch.conf, resolv.conf, /etc/hosts, and how they all work together. The joke in IT is that problems are "always DNS" -- so it's important to understand how it works!
This video will be helpful if you're also doing our Weekend Assignments. Weekend Assignment #19 (https://snar.co/wa19) is what we'll cover this Sunday on our livestream. If that's already passed, check out our playlist of solutions: https://snar.co/solutions
The CompTIA Linux+ objectives are available here: https://snar.co/plusobjectives
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