I come from just trying to document the same bug (I searched first to
check something similar but did not find it)
The GUI to add a user in Ubuntu allows a username beginning with a number
(checked appears ok but call to user creation fails).
The reason is that the called Perl script adduser d
Public bug reported:
The GUI to add a user in Ubuntu allows a username beginning with a number
(checked appears ok but call to user creation fails).
The reason is that the called Perl script adduser does not accept it. This
script is configurable in /etc/adduser.conf:
# check user and group name