Hmm, that's odd. Trusty definitely has the --add-subuids argument as we make use of it in LXC in the archive and LXD for the backport.
It looks like your system wasn't fully on Ubuntu 14.04 before you upgraded to 16.04 and ended up still using 12.04's version of passwd which lacks the option. ``` root@trusty:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.5 LTS Release: 14.04 Codename: trusty root@trusty:~# dpkg -l passwd Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-=======================-================-================-==================================================== ii passwd 1:4.1.5.1-1ubunt amd64 change and administer password and group data root@trusty:~# usermod --help | grep subuid -v, --add-subuids FIRST-LAST add range of subordinate uids -V, --del-subuids FIRST-LAST remvoe range of subordinate uids root@trusty:~# ``` ** Changed in: lxd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1672100 Title: lxd fails to install To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1672100/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs