System can't recover

Folowed this steps

apt-get update _____INSTALED
apt-get dist-upgrade_____INSTALED
apt-get install -y linux-headers-$(uname -r) ___________NOT INSTALED

apt-get install nvidia-kernel-dkms ___________after this comand waited to instal when finished required reboot for drivers... also had WARNING CRYPTSETUP ....typed reboot then while booting it showed me OH NO SOMETHING HAS GONE WRONG SYSTEM CANT RECOVER