Basic 2 — see the diff, then a second snapshot

Band: Beginner
Setup: Exercise 1 done in /tmp/git-ex1, or repeat first success there.

Task: Change notes.txt, run git status and git diff before git add. Stage, run git diff --staged, commit with message Edit notes.

Hint: git diff is the working tree versus the index. After git add, that hunk moves to git diff --staged.

Success: git log --oneline shows two commits. The newest message is Edit notes. git show HEAD:notes.txt prints the new text, not the first line only.

cd /tmp/git-ex1
echo "second line" >> notes.txt
git status
git diff
git add notes.txt
git diff --staged
git commit -m "Edit notes"
git log --oneline