# 版本回退

## 查看版本

1\.

```bash
$ git log
```

查看以往版本

```bash
$ git log --pretty=online
```

查看最近的一个版本

```bash
$ git reflog
```

查看以往每一次命令

## 返回版本

```bash
$ git reset --hard HEAD^
```

返回上一个版本，工作区文件对应改变

```bash
$ git reset --hard 1094a # 版本号只需前几位，git 会自动匹配
```

返回指定版本号

## 小结

### 使用场景

* `HEAD`指向的版本就是当前版本，因此，Git允许我们在版本的历史之间穿梭，使用命令`git reset --hard commit_id`。
* 穿梭前，用`git log`可以查看提交历史，以便确定要回退到哪个版本。
* 要重返未来，用`git reflog`查看命令历史，以便确定要回到未来的哪个版本。


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