You have been subscribed to a public bug:
It happened to me to try to create a username containing a dot such as
name.surname on ubuntu 13.10
According to the "Users and Groups" tool (gnome-system-tool):
Username must consists of:
> lower case letters from the English alphabet
> digits
> any of the characters ".", "-" and "_"
but trying to add a username like name.surname using that tool you will get an
error window saying:
"The configuration could not be saved"
"an unknown error occurred"
Opening a terminal and typing
sudo useradd name.username
sudo passwd name.username
actually seems to work, but then the brand new user results to be
completely unusable:
- switching user selecting the new user from the top-right ubuntu icon
on the top bar will lead to have a black screen
- hard rebooting and trying to select the new user will lead to be
trapped in a loop: you insert the password onto the login tool, it seems
to be loading the new user while after a while it gives again the login
tool window and you can keep on inserting the password forever. At this
point selecting a different user previously created without a dot will
work as normal instead.
uname -a
Linux ubook- 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
** Affects: unity-control-center (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
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cannot use username containing dot in ubuntu 13.10 64bit
https://bugs.launchpad.net/bugs/1301404
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