IT/Software/Command Line Applications/wakeonlan

General

You need to allow this in the BIOS first.

Then the computers need to be kept attached to the network and power.

Having them on a UPS is good.

Basic Usage

• Say you are working at home.
• You want to turn on and update all the computers
• You can login to the main server, wake up all the desktops and they update.

Background

• Find out who is on the lan.

sudo arp-scan 192.168.2.0/24   

Configuration

• There are countless tutorials on how to do this.
• Making it "persistent" is the tricky bit.
• Install some tools
  • test

sudo apt install net-tools ethtool

• net-tools brings ifconfig and arp which allows a LAN scan for MAC addresses

See what is enabled.

sudo ethtool interfaceName

• for example sudo ethtool enp3s0
  • look for Wake-on and see what is supported and enabled.
  • we want "g"
• Look what is persistent

nmcli c show jademonkeyWired | grep 802-3-ethernet.wake-on-lan

• You will get an output like this

802-3-ethernet.wake-on-lan: magic

802-3-ethernet.wake-on-lan-password: --

• We want "magic" not "default"
• If not "magic" then modify it by

nmcli c modify jademonkeyWired 802-3-ethernet.wake-on-lan magic

Another thing you may need to do is:

sudo ethtool -s enp1s0 wol g

• This does not seem to be as persistent.