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.
Solution
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
Rick Donato is a Network Automation Architect/Evangelist and the founder of Packet Coders.
Latest posts by Rick Donato (see all)
- NETCONF & YANG: Automate Network Configs via Python - April 2, 2026
- Palo Alto – How to Configure Your Next-Generation Firewall - April 2, 2026
- How to Harden Linux SSH: Keys, Fail2ban & Ciphers - March 1, 2026
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