lxc@d476bb08a4b3:/$ lxc-create -t download -n p1 -- -d ubuntu -r trusty -a amd64             
WARN: could not reopen tty: No such file or directory
unshare: Operation not permitted
read pipe: Success
lxc_container: Error chowning /home/lxc/.local/share/lxc/p1/rootfs to container root
lxc_container: Error creating backing store type (none) for p1
lxc_container: Error creating container p1