📝 Update Phase 1 & 2 with Alpine-specific fixes (ash vs bash, rsync install, SSH key details)

Midori's Linux Dojo 🌸/Phase 1 - Walking/Exercises.md

@@ -68,28 +68,53 @@ uname -r                # Kernel version
 ## 🎯 Exercise 3 — File Permissions
 
 ```bash
-# Check permissions
-ls -la /root/lab/notes/
+# Step 1 — Check current permissions
 ls -la /root/lab/
 
-# Change permissions
-chmod 644 /root/lab/notes/hello.txt
-chmod 755 /root/lab/scripts
+# Step 2 — Understand the columns
+# -rw-r--r--  1  root  root  20  May 21  file
+# ─┬─ ─┬─ ─── permissions, owner, group, size, date, name
+#  │   └── user/group/other  (r=read, w=write, x=execute)
+#  └── file type (-=file, d=directory)
 
-# Create a script
+# Step 3 — Create a script
+# ⚠️ Alpine uses ash, NOT bash! Use #!/bin/sh
+mkdir -p /root/lab/scripts
 echo '#!/bin/sh' > /root/lab/scripts/sayhello.sh
 echo 'echo "Hello from a script!"' >> /root/lab/scripts/sayhello.sh
+# 🔴 If you use #!/bin/bash it will say "not found"!
+
+# Step 4 — Check permissions before making it executable
+ls -la /root/lab/scripts/sayhello.sh
+# Try to run it — should fail (no +x)
+./root/lab/scripts/sayhello.sh || echo "Failed! Need +x permission"
+
+# Step 5 — Add execute permission
 chmod +x /root/lab/scripts/sayhello.sh
+ls -la /root/lab/scripts/sayhello.sh
 ./root/lab/scripts/sayhello.sh
 
-# Test permissions
+# Step 6 — Change permissions with numeric mode
+chmod 644 /root/lab/scripts/sayhello.sh
+ls -la /root/lab/scripts/sayhello.sh
+
+# Step 7 — Remove execute permission
 chmod -x /root/lab/scripts/sayhello.sh
-./root/lab/scripts/sayhello.sh   # What happens?
+./root/lab/scripts/sayhello.sh || echo "Permission denied!"
+
+# Step 8 — Work with directories (need +x to enter)
+mkdir -p /root/lab/secret
+echo "classified" > /root/lab/secret/data.txt
+chmod 700 /root/lab/secret
+ls -la /root/lab/ | grep secret
+ls /root/lab/secret
 ```
 
 ### 📝 Questions:
-1. What do the numbers `644`, `755`, and `+x` mean?
-2. What happens when you remove execute permission from a script?
+1. What does `ls -la` show? Describe each column.
+2. What does `+x`, `-x`, `644`, `755`, `700` mean?
+3. Why does a script need `+x` but `cat file.txt` doesn't?
+4. Why does a directory need `+x` to be accessible?
 
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