1. set netplan configuration

for inter in $(ls /sys/class/net); do
if [[ $inter != 'lo' ]]; then
cat << EOF > /etc/netplan/99-$inter.yaml
network:
  ethernets:
    $inter:
      dhc4: true
  version: 2
  renderer: networkd
EOF
ip link set dev $inter up 
fi
done

2. apply configurations

netplan apply

3. check IP status

ip a

Set network config on boot

1. combine script as a shell /etc/netplan/gen_netplan_config.sh

#!/bin/env bash

umask 377

for inter in $(ls /sys/class/net); do
if [[ $inter != 'lo' ]] && [[ ! -e /etc/netplan/99-$inter.yaml ]]; then
cat << EOF > /etc/netplan/99-$inter.yaml
network:
  ethernets:
    $inter:
      dhcp4: true
  version: 2
  renderer: networkd
EOF
ip link set dev $inter up
fi¡™™¡
done
netplan apply

2. write /usr/lib/systemd/system/wait-netplan-dhcp.service³

[Unit]
Description=Generate DHCP networking DHCP demo for netplan
Before=network-online.target

[Service]
ExecStart=/etc/netplan/gen_netplan_config.sh

[Install]
WantedBy=multi-user.target

3. start and enable

systemctl start wait-netplan-dhcp
systemctl enable wait-netplan-dhcp

---

1. Create a systemctl service↩