Wake on LAN (WOL) for Ubuntu 20

dito Proxmox but with orhter path for ethtool:

nano /etc/systemd/system/wol.service

    [Unit]
    Description=Wake-on-LAN for <interface id>
    Requires=network.target
    After=network.target

    [Service]
    ExecStart=/sbin/ethtool -s <interface id> wol g
    ExecStop=/sbin/ethtool -s <interface id> wol g

    [Install]
    WantedBy=multi-user.target 

systemctl start wol.service
systemctl enable wol.service
systemctl is-enabled wol.service
systemctl daemon-reload 

Wake on LAN (WOL) for Ubuntu 18 (Bionic)

On a server without GUI = with “Netplan” and without “Network-manager”
https://askubuntu.com/questions/1053302/wake-on-lan-not-working-if-i-turn-of-with-ubuntu

Send a Magic Packet at startup for Ubuntu 20
Useful to wakeup a server when the client starts.

$ sudo nano /etc/systemd/system/wol-omv.service
[Unit]
After=network-online.target
Wants=network-online.target

[Service]
ExecStart=/usr/local/bin/wol-omv.sh

[Install]
WantedBy=default.target 

sudo nano /usr/local/bin/wol-omv.sh
#!/bin/bash

/usr/sbin/etherwake -i enp34s0 69:70:BC:AD:4B:A2    ///// use your correct interface name and the correct mac address!!

sudo chmod 744 /usr/local/bin/wol-omv.sh
sudo chmod 664 /etc/systemd/system/wol-omv.service 

sudo systemctl start wol-omv.service
sudo systemctl enable wol-omv.service
sudo systemctl daemon-reload 

Script pour contrôler que la machine qui a recu le paquet magique s'est bien lancée - peut être ajouté au script de WOL:

# enter le suffixe de l'adresses de la machine à surveiller - sur réseau: 192.168.20.0
ip=(69)

for i in `seq 1 10`; do

        echo "test ping sur IP 192.168.20."$ip":";
        if  $(ping -c 1 192.168.20.$ip &> /dev/null) ; then
                echo "machine 192.168.20."$ip" en ligne"
                beep -f 1000 -n -f 2000 -n -f 1500
                exit 

        else
                echo "machine 192.168.20."$ip" pas présente"
                sleep 10s;
        fi
done

echo "machine 192.168.20."$ip" pas présente"
beep -f 300.7 -r 2 -d 100 -l 400