Ubuntu RPi4 first login

ubuntu-rpi-first-login.txt

MBP18VTK:~ kvutien$ ssh ubuntu@192.168.178.45
The authenticity of host '192.168.178.45 (192.168.178.45)' can't be established.
ECDSA key fingerprint is SHA256:ASIUuKFlPg7crrGuucbLwPVrrRabYBDdo0MJgQCzDew.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.178.45' (ECDSA) to the list of known hosts.
ubuntu@192.168.178.45's password: ubuntu
You are required to change your password immediately (administrator enforced)
Welcome to Ubuntu 20.04.3 LTS (GNU/Linux 5.4.0-1042-raspi aarch64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Wed Sep 15 12:06:53 UTC 2021

  System load:            0.0
  Usage of /:             6.8% of 28.96GB
  Memory usage:           35%
  Swap usage:             0%
  Temperature:            48.3 C
  Processes:              132
  Users logged in:        0
  IPv4 address for wlan0: 192.168.178.45
  IPv6 address for wlan0: 2001:7e8:ccdd:e000:ba27:ebff:fe2e:a4e3

 * Super-optimized for small spaces - read how we shrank the memory
   footprint of MicroK8s to make it the smallest full K8s around.

   https://ubuntu.com/blog/microk8s-memory-optimisation

3 updates can be applied immediately.
To see these additional updates run: apt list --upgradable


*** System restart required ***

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

WARNING: Your password has expired.
You must change your password now and login again!
Changing password for ubuntu.
Current password: 
New password: 
Retype new password: 
passwd: password updated successfully
Connection to 192.168.178.45 closed.
MBP18VTK:~ kvutien$ ssh ubuntu@192.168.178.45
ubuntu@192.168.178.45's password: 
Welcome to Ubuntu 20.04.3 LTS (GNU/Linux 5.4.0-1042-raspi aarch64)
...[same welcome prompt]...

*** System restart required ***
Last login: Wed Sep 15 12:06:57 2021 from 192.168.178.20
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

[command to shutdown and restart the RPi, and ssh login again]
ubuntu@ubuntu:~$ sudo shutdown now -r
Connection to 192.168.178.45 closed by remote host.
Connection to 192.168.178.45 closed.
MBP18VTK:~ kvutien$ ssh ubuntu@192.168.178.45
ubuntu@192.168.178.45's password: 
Welcome to Ubuntu 20.04.3 LTS (GNU/Linux 5.4.0-1042-raspi aarch64)
...[same welcome prompt]...

Last login: Wed Sep 15 12:07:46 2021 from 192.168.178.20
ubuntu@ubuntu:~$