Netplan

Since Ubuntu 16.04 LTS network configuration is done using netplan , and source code is available in GitHub since July 20106: https://github.com/CanonicalLtd/netplan/releases/tag/0.1.

Depending on your Bionic (18.04LTS) installation method, your configuration file will be different:

INSTALL TYPE	RENDERER	FILE
Server ISO	systemd-networkd	/etc/netplan/01-netcfg.yaml
Cloud Image	systemd-networkd	/etc/netplan/50-cloud-init.yaml
Desktop ISO	NetworkManager	/etc/netplan/01-network-manager-all.yaml

Basic Commands

• netplan try (you can also verity your YAML file before trying it, for example using yq utility)
• netplan generate to validate the configuration is correctly parsed by netplan and written to disk so next boot will be available.
• netplan --debug apply
• netplan apply

Config Files

• /etc/netplan/*.yaml (Read Netplan examples: https://netplan.io/examples)

Activities

Basic

1. Read Netplan examples: https://netplan.io/examples
2. Configure your DNS servers in Ubuntu. https://www.techrepublic.com/article/how-to-set-dns-nameservers-in-ubuntu-server-18-04/

Advanced

1. Review netplan source code: https://github.com/CanonicalLtd/netplan

See also

• systemd: systemd-networkd and networkctl
• ip [link, route], ifconfig netstat ss lsof ping ethtool mii-tool arping nmcli(RHEL) route networkctl, netplan, tc

• Ethernet

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Original Source: https://en.wikiversity.org/wiki/Ubuntu/netplan