t2.9/z1.txt

z1
z2
Sure! Below are simplified instructions for the topic **2.2 Git Basics – Recording Changes in the Repository**.

# 2.2 Recording Changes in Git

## Goal

You will learn to:

* Check the repository status
* Add files to staging area
* Commit changes
* View differences

---

## Glossary

* **Tracked** – file was in the last commit
* **Untracked** – new file for Git
* **Staging area** – list of changes that will go into the next commit
* **Commit** – saved snapshot of the project

---

## Key Commands

### 1) Check status

```bash
git status
```

### 2) Add to staging area

```bash
git add filename
```

### 3) View differences

* **Changes not in staging area**:

```bash
git diff
```

* **Changes in staging area**:

```bash
git diff --staged
```

### 4) Commit changes

```bash
git commit -m "Description of changes"
```

---

## Simple workflow

1. **Check status**: `git status`
2. **Add to staging area**: `git add <file>`
3. **Commit**: `git commit -m "Description"`

---

## Exercise (10 min)

1. **Create a repository**

```bash
git init git-lesson
cd git-lesson
```

2. **Create and commit a file**

```bash
echo "Hello Git!" > README.md
git add README.md
git commit -m "Add README"
```

3. **Modify the file**

```bash
echo "Second line" >> README.md
git status
git diff
git add README.md
git commit -m "Add second line"
```

4. **Check history**

```bash
git log --oneline
```