[급질]갑자기 부팅이 안됩니다 ㅠㅠ

우분투 데퍼를 쓰고 있는데

오늘 부팅이 안됩니다. ㅠㅠ 어제 업데이트를 했는데 그거 때문인지..ㅠㅠ

Mount /dev/sda2 on /root failed. No such device
Mount /root/dev/ on /dev/.static./dev/ failed. No such device and directory
Mount /sys on /root/sys failed. No such device and directory
Mount /proc on /root/proc failed. No such device and directory
Target filesystem doesn't have /sbin/init

라는 에러가 나옵니다. ㅠㅠ