1. Filesystem: The Map Every Engineer Needs
This bonus episode dives into the Linux filesystem—how files, logs, configs, and user data are really organized on your server.
Explore
/etc,/var,/home,/usr,/tmpand moreFind logs, config files, and where apps install stuff
Use commands like
ls,find,du,tail, andchmodfor real-world tasksWhy knowing the filesystem prevents accidental deletes, security mistakes, and lost logs
I show common mistakes (like deleting the wrong directory) and demo how to recover—or avoid disaster in the first place.
2. All Labs & Checklists—Direct to Your Inbox
Get the printable filesystem checklist, command cheat sheet, and practical challenge list—no paywall, no spam, just actionable content.
3. Filesystem Lab Checklist
List files and directories in
/,/etc,/var, and your homeFind all
.conffiles in/etcCheck disk usage with
du -sh *View logs with
tail /var/log/syslog(or/messages)Create, move, and change permissions on test files
Try the bonus challenge: Find the biggest directory in your home, and see what’s eating your space!
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5. What I Learned
Most server “mysteries” are just a filesystem puzzle.
When in doubt, start with ls, find, or du—and read the logs!
6. What Should I Dive Into Next?
What Linux or DevOps “mystery” do you want solved in the next bonus episode?
Reply or comment with your story!
See you in the next lab!