Use single user mode to assist in troubleshooting system boot issues or for password recovery. To enter single user mode, follow the steps below.
Boot the switch as soon as you see the GRUB menu.
Use the ^ and v arrow keys to select Advanced options for Cumulus Linux GNU/Linux. A menu similar to the following should appear:
- Select Cumulus Linux GNU/Linux, with Linux 4.1.0-cl-7-amd64 (recovery mode).
- Press ctrl-x to reboot.
After the system reboots, set a new root password. This is useful since the root user provides complete control over the switch, and providing a new password now helps in case the current password has been forgotten, which is a common problem.
You may want to take this opportunity to reset the password for the cumulus account as well.
btrfs, then reboot the system: