Merge branch 'TrainWithShubham:master' into master

Author: manoj-ravidas

2026/day-12/README.md

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+# Day 12 – Breather & Revision (Days 01–11)
+
+## Goal
+Take a **one-day pause** to consolidate everything from Days 01–11 so you don’t forget the fundamentals you just built.
+
+## Expected Output
+- A markdown file: `day-12-revision.md`  
+  (bullet notes + checkpoints)  
+- Optional: screenshots of any re-runs you do
+
+## What to Review (pick at least one per section)
+- **Mindset & plan:** revisit your Day 01 learning plan—are your goals still right? any tweaks?  
+- **Processes & services:** rerun 2 commands from Day 04/05 (e.g., `ps`, `systemctl status`, `journalctl -u <service>`); jot what you observed today.  
+- **File skills:** practice 3 quick ops from Days 06–11 (e.g., `echo >>`, `chmod`, `chown`, `ls -l`, `cp`, `mkdir`).  
+- **Cheat sheet refresh:** skim your Day 03 commands—highlight 5 you’d reach for first in an incident.  
+- **User/group sanity:** recreate one small scenario from Day 09 or Day 11 (create a user or change ownership) and verify with `id`/`ls -l`.
+
+## Mini Self-Check (write short answers in `day-12-revision.md`)
+1) Which 3 commands save you the most time right now, and why?  
+2) How do you check if a service is healthy? List the exact 2–3 commands you’d run first.  
+3) How do you safely change ownership and permissions without breaking access? Give one example command.  
+4) What will you focus on improving in the next 3 days?
+
+## Suggested Flow (30–45 minutes)
+- 10 min: skim notes from each day, update Day 01 plan if needed.  
+- 15–20 min: rerun a tiny hands-on set (process check, service check, file permission change).  
+- 5–10 min: write the self-check answers and key takeaways.
+
+## Tips
+- Keep it light—this is about retention, not new concepts.  
+- If something felt shaky this week (e.g., `chmod` numbers, `journalctl` flags), practice that specifically.  
+- Small wins: one screenshot of a command rerun + 5 bullet notes is enough.
+
+## Submission
+1. Navigate to `2026/day-12/`  
+2. Add `day-12-revision.md` with your bullets and answers  
+3. Commit and push to your fork
+
+## Learn in Public
+Post 2–3 lines on what you reinforced today and one command you now remember confidently.
+
+Use hashtags:  
+#90DaysOfDevOps  
+#DevOpsKaJosh  
+#TrainWithShubham
+
+Happy Learning  
+**TrainWithShubham**