I have the same problem. First, I did a small test with few users (about 2 to update and one to added) and it worked, but when I would like to push all the list of my job users (20 lines with 5 first one already registered), I have this error.
Ubuntu Trusty server 14.04.2 - Linux 3.13.0-49-generic x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1266675 Title: newusers error adding more than one user To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1266675/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs