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Booting to Single User or Runlevel

On any Linux system running grub with a boot menu, you can specify the runlevel to the init program as follows:

  1. When the boot menu is displayed, press the up or down arrow key to stop the auto boot process.
  2. Using the arrow keys, select the kernel that you wish to boot.
  3. Press the “e” key to edit this boot config.
  4. Use the arrow keys to select the “kernel …. ” boot command.
  5. Press the “e” key to edit this boot command.
  6. Add a runlevel number or the word “single” to the end of the command line.
  7. Press the “b” key to boot the edited config.