====== password ======

to change the password connect to the container and change the password

  lxc exec <container-name> bash

you will be connected as root user, and changing the root password


====== networking ======

  lxc network edit lxdbr0

  * using the cli

  lxc network set lxdbr0 ipv4.address 10.1.11.1/24
  lxc network set lxdbr0 ipv4.dhcp.ranges 172.31.18.100-172.31.18.200