vi不保存退出

To quit the vi editor without saving any changes you've made

• If you are currently in insert or append mode, press Esc .
• Press : (colon). The cursor should reappear at the lower left corner of the screen beside a colon prompt.
• Enter the following: q!

步骤如下：

1. 按ESC
2. 按住shift键 + ：键
3. 输入q!
4. 回车