This works great, and I’d already been using this after reading it from several of your fantastic tutorials.
This one doesn’t work for me. I get the following output (from an ubuntu-minimal:bionic container, which might explain it?)
seffyroff@celery:~$ lxc alias add ubuntu 'exec @ARGS@ --mode interactive -- /bin/sh -xac ubuntu - exec /bin/login -p -f '
seffyroff@celery:~$ lxc ubuntu lxdui
+ ubuntu
-: 1: -: ubuntu: not found