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Single User Mode - Boot Recovery

Use single user mode to assist in troubleshooting system boot issues or for password recovery.

Entering Single User Mode

  1. Boot the switch, as soon as you see the GRUB menu.

                           GNU GRUB  version 2.02~beta2-22+deb8u1
        
     +----------------------------------------------------------------------------+
     |*Cumulus RMP GNU/Linux                                                    | 
     | Advanced options for Cumulus RMP GNU/Linux                               |
     | ONIE                                                                       |
     |                                                                            |
     +----------------------------------------------------------------------------+     
    
  2. Use the ^ and v arrow keys to select Advanced options for Cumulus RMP GNU/Linux. A menu similar to the following should appear:

                           GNU GRUB  version 2.02~beta2-22+deb8u1
        
     +----------------------------------------------------------------------------+
     | Cumulus RMP GNU/Linux, with Linux 4.1.0-cl-1-amd64                       | 
     | Cumulus RMP GNU/Linux, with Linux 4.1.0-cl-1-amd64 (sysvinit)            |
     |*Cumulus RMP GNU/Linux, with Linux 4.1.0-cl-1-amd64 (recovery mode)       |
     |                                                                            |
     +----------------------------------------------------------------------------+    
    
  3. Select Cumulus RMP GNU/Linux, with Linux 4.1.0-cl-1-amd64 (recovery mode).

  4. Press ctrl-x to reboot.

  5. After the system reboots, set a new password.

    # passwd
    Enter new UNIX password: 
    Retype new UNIX password: 
    passwd: password updated successfully
    
  6. Reboot the system:

    # sync
    # reboot -f
    Restarting the system.