userdel oracle cd /home rm -rf oracle cd /var/spool/mail 若找不到oracle目錄，可以find ps:find / name "*oracle*"
![oracle中的start with connect by用法[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)