IT/Software/Command Line Applications/wakeonlan: Difference between revisions
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*You can login to the main server, wake up all the desktops and they update. | *You can login to the main server, wake up all the desktops and they update. | ||
=== Background === | ===Background=== | ||
* Find out who is on the lan. | *Find out who is on the lan. | ||
<code>sudo arp-scan 192.168.2.0/24 </code> | <code>sudo arp-scan 192.168.2.0/24 </code> | ||
| Line 48: | Line 48: | ||
*If not "magic" then modify it by | *If not "magic" then modify it by | ||
<code>nmcli c modify jademonkeyWired 802-3-ethernet.wake-on-lan magic | <code>sudo nmcli c modify jademonkeyWired 802-3-ethernet.wake-on-lan magic | ||
</code> | </code> | ||
Latest revision as of 08:20, 4 December 2020
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
sudo 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.