Enter to grub mode (press any key after restart the server):
add init=/bin/bash to the end of the kernel command line and press enter
The system will boot to a prompt.
Run the commands in the prompt:
mount -o remount,rw /
vim /etc/fstab (if can't found "vim", try /bin/vi)
Edit the fstab file, comment the errors by adding a # at the begining of each problematic line, save the file
Reboot by pressing CTRL+ALT+DEL