Ubuntu - Ubiquity Error "The username you entered is invalid"

When Installing Ubuntu from a Live CD via the graphical installer ubiquity you may receive the following error :

              The username you entered is invalid. Note that usernames
              must start with a lower-case letter, which can be followed
              by any combination of numbers and more lower-case letters.


This error can occur due to the migration assist attempting to migrate documents and settings from other installed operating systems.  To prevent this feature use the --no-migration-assistant option.

root@root:~# ubiquity --no-migration-assistant

About the Author


R Donato

Rick Donato is the Founder and Chief Editor of He currently works as an SDN/NFV Solutions Architect and has a keen interest in automation and the cloud.

You can find Rick on Twitter @f3lix001