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Issue #1 – IP Address not configured correctly

The fix

sudo rm /etc/machine-id
sudo systemd-machine-id-setup
sudo reboot

as per https://jaylacroix.com/fixing-ubuntu-18-04-virtual-machines-that-fight-over-the-same-ip-address/

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Issue #2 – Time Sync (aka NTP Server / Client Config)

The fix

setup ntp server on ubuntu01

setup ntp client on ubuntu02 through ubuntu04

as per https://vitux.com/how-to-install-ntp-server-and-client-on-ubuntu/

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Issue #3 – Time / Date Appearance

The fix – simple reconfiguration as per https://linuxize.com/post/how-to-set-or-change-timezone-on-ubuntu-18-04/