Netplan

netplan command is used for network configuration in Ubuntu Since Ubuntu 16.04 LTS. netplan is included in netplan.io package and source code is available in GitHub https://github.com/CanonicalLtd/netplan/releases/tag/0.1.

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)

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

Activities

Basic

1. Read Netplan examples: https://netplan.io/examples including Netplan Bonding and additional 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

• Netplan: netplan try, netplan apply, examples, networkd
• Systemd: systemctl, systemd-journald, journalctl systemd-cat, systemd-logind, systemd-networkd:networkctl, systemd-timesyncd, systemd-resolved, systemd-udevd , Systemd-logind: loginctl, hostnamectl, udevadm, systemd-run, portablectl, systemd-nspawn, systemd resource management, Timer (systemd), systemd logs, /etc/systemd/, systemd services, systemd-mount, /run/systemd/, .service, /usr/lib/systemd/, /usr/lib/systemd/system/, /usr/lib/systemd/system/systemd-resolved.service, /lib/systemd/, machinectl, systemd-oomd, systemd-analyze
• ip [link, route], ifconfig netstat ss lsof ping ethtool mii-tool arping nmcli(RHEL) route networkctl, netplan, tc
• Ethernet: MII, MDI, bonding, etherchannel, STP, ARP, MAC, STP, Jumbo frames, 802.1X, MTU, Ethernet In-Band Access (IBA), LACP, Multicast, Broadcast, SPI

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