======GRUB======
=====Boot into Single User Mode=====
  - At grub boot screen (after restart)
  - Select the kernel
  - Press the e key to edit the entry
  - Select second line (the line starting with the word kernel)
  - Press the e key to edit kernel entry so that you can append single user mode
  - Append the letter s (or word single) to the end of the (kernel) line
  - Press ENTER key
  - Now press the b key to boot the Linux kernel into single user mode
  - When prompted give root password and you be allowed to login into single user mode.