Hi Leo. On system configuration -> Users -> Add New User. If the system user contains '.' (maybe even some others characters) the system reports and error but does not clarifies why in order to change the entry.
Cheers -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to adduser in Ubuntu. https://bugs.launchpad.net/bugs/1574959 Title: Graphic adduser crashes on username having characters not allowed Status in adduser package in Ubuntu: Incomplete Bug description: "running '/usr/sbin/adduser' failed: El proceso hijo terminó con el código 1" ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: adduser 3.113+nmu3ubuntu4 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Apr 25 23:25:35 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2016-04-23 (2 days ago) InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64 (20160421) PackageArchitecture: all SourcePackage: adduser UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/adduser/+bug/1574959/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp