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!
步驟如下：
- 按ESC
- 按住shift鍵 + ：鍵
- 輸入q!
- 回車