How to migrate from ipupdown to netplan

As you remember I have to install Ubuntu 17.10, because 16.04LTS does not support ixgbe: Intel(R) 10 Gigabit PCI Express Network Driver - version 5.1.0-k at my Supermicro SYS-E200-9A. But... Surprise! Surprise! Community deprecated ifupdown in Ubuntu for the 17.10 release. And deliver a unified network stack of netplan and networkd/network-manager across all 17.10 images in preparation for the 18.04 LTS.
Configuration is now written as YAML files to /etc/netplan instead of in /etc/network/interfaces. Goodbye my love, goodbye!

These two links will be helpful for everyone who are not familiar with netplan

MigratingToNetplan https://wiki.ubuntu.com/MigratingToNetplan

Netplan https://wiki.ubuntu.com/Netplan

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