If you did not create a user account in the firstboot screens, switch to a console by pressing Ctrl+Alt+F2, log in as root and use the password you assigned to root.
If you cannot remember your root password, boot your system as
If you are using an x86-based system and GRUB is your installed boot loader, type
e for edit when the GRUB boot screen has loaded. You are presented with a list of items in the configuration file for the boot label you have selected.
Choose the line that starts with
kernel and type
e to edit this boot entry.
At the end of the
kernel line, add:
Press Enter to exit edit mode.
Once the boot loader screen has returned, type
b to boot the system.
Once you have booted into single user mode and have access to the
# prompt, you must type
passwd root, which allows you to enter a new password for root. At this point you can type
shutdown -r now to reboot the system with the new root password.
If you cannot remember your user account password, you must become root. To become root, type
su - and enter your root password when prompted. Then, type
passwd <username>. This allows you to enter a new password for the specified user account.
If the graphical login screen does not appear, check your hardware for compatibility issues. The Hardware Compatibility List can be found at: