Configure network with netplan on Ubuntu

I installed new Ubuntu 19.10 server and realized that I need to use netplan to configure the network.

root@haifeli-ubuntu-1:/# cat /etc/issue
Ubuntu 19.10 \n \l

root@haifeli-ubuntu-1:/#

The following is my configuration.

Configure the IP address and DNS

root@haifeli-ubuntu-1:/# cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        ens192:
            dhcp4: false
            addresses: [192.168.52.52/24]
            gateway4: 192.168.52.1
            nameservers:
                addresses: [192.168.100.1]
    version: 2
root@haifeli-ubuntu-1:/#

Configure proxy

root@haifeli-ubuntu-1:/# cat /etc/environment


PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
http_proxy="http://192.160.200.1:80"



root@haifeli-ubuntu-1:/#

Save configuration

root@haifeli-ubuntu-1:/# netplan try
Warning: Stopping systemd-networkd.service, but it can still be activated by:
  systemd-networkd.socket
Do you want to keep these settings?


Press ENTER before the timeout to accept the new configuration


Changes will revert in 119 seconds
Configuration accepted.
root@haifeli-ubuntu-1:/#

We can also use apply to save directly.

root@haifeli-ubuntu-1:/# netplan apply