Grand Finale and Cleanup

What you’ll practice

• Complete an integrated project
• Create a backup
• Clean up safely

The mental model

• A good Linux workflow creates, verifies, backs up, and then removes only intended files.
• Cleanup is safe when the path is explicit and checked.

Try it in your terminal

cd ~/linux-practice
mkdir -p final_project/{src,docs,bin} backups
cd final_project
echo 'main function' > src/main.c
echo '# README' > docs/README.md
cat << 'EOF' > bin/script.sh
#!/usr/bin/env bash
echo 'Processing...'
for f in src/*; do
  echo "Found: $f"
  wc -l "$f"
done
EOF
chmod +x bin/script.sh

cd ~/linux-practice/final_project
tar -czvf ../backups/final-project-v1.tgz src docs bin
tar -tzf ../backups/final-project-v1.tgz
find . -name '*.sh' -exec ls -lh {} \;
grep -r 'function' .
head -2 docs/README.md
find . -type f \( -name '*.c' -o -name '*.sh' \) -print0 | xargs -0 wc -l
du -sh .
./bin/script.sh

cd ~/linux-practice
rm -rf final_project

Put it into practice

1. Run the final project from start to finish.
2. Explain each command in your own words before cleanup.

Milestone challenge

Complete the final mini project without following the lab line by line: build it, verify it, archive it outside the project, test the archive, remove only the project, and prove the backup survived.

Common mistakes

• You `cd` somewhere, type `rm -rf *`, and realize you're in your home directory instead of the project folder. Always run `pwd` before any destructive command. The path you see in your prompt is the path `rm` will use. Verify before you delete.
• Never store a recovery archive inside the directory it protects. Verify the external archive with `tar -tzf backups/final-project-v1.tgz` before removing the project.

Check your understanding

Explain these in your own words. If you’re unsure, revisit the examples before moving on.

1. Which command created the backup?
2. What should you check before running rm -rf?

Clean up this exercise

cd ~ && rm -rf ~/linux-practice

            ~/linux-practice no longer exists