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Booting Linux in single user mode

  1. Restart the system , wait till grub appears.
  2. Select the kernel you want to boot into and press e to enter into edit mode.
  3. Edit the line which starts with kernel , some thing like this
          kernel /boot/vmlinuz-X.X.X.X.X. ro root=LABEL=/ rhgb quiet
     4. Add keyword 'single' at the end of the line and press enter to exit edit mode.
     5. Now select the kernel and press b to boot into single usermode.
    

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