# 快捷键和技巧命令

1、ctrl系列命令

```bash
ctrl l #清屏
ctrl u #删除命令行中正在输入的command
ctrl a #定位光标到首个字母
ctrl e #定位光标到末尾字母
ctrl r #历史命令搜索
ctrl z #最小化到后台

ctrl shift + #增大字体大小
ctrl  - #减小字体大小
```

2、重置shell窗口

```bash
reset
```

3、历史命令搜索

```bash
ctrl r
```

4、回到上一次停留的目录

```bash
cd -
```

5、历史命令

```bash
history

#对命令进行格式化，写入.bashrc等文件
HISTTIMEFORMAT="%Y-%M-%D %T "
```

6、快速执行历史命令

```bash
!number
```

7、快速执行上一个命令

```bash
!!
sudo !!
```

8、前台和后台

```bash
#将当前程序最小化到后台
ctrl Z

#将后台最小化的程序拿回到前台
fg
```

9、滚动查看文件的最后几行

```bash
tail -f -n 10 fileName
#在查看日志内容实时更新上用你知道吗?
```



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