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=== | |||
*Find out who is on the lan. | |||
<code>sudo arp-scan 192.168.2.0/24 </code> | |||
==Configuration== | ==Configuration== | ||
| Line 17: | Line 22: | ||
*Making it "persistent" is the tricky bit. | *Making it "persistent" is the tricky bit. | ||
*Install some tools | *Install some tools | ||
**test | |||
<code>sudo apt install net-tools ethtool</code> | <code>sudo apt install net-tools ethtool</code> | ||
*net-tools brings ifconfig and arp which allows a LAN scan for MAC addresses | |||
See what is enabled. | See what is enabled. | ||
| Line 26: | Line 32: | ||
<code>sudo ethtool interfaceName</code> | <code>sudo ethtool interfaceName</code> | ||
*for example sudo ethtool enp3s0 | |||
**look for Wake-on and see what is supported and enabled. | **look for Wake-on and see what is supported and enabled. | ||
**we want "g" | |||
*Look what is persistent | *Look what is persistent | ||
<code>nmcli c show jademonkeyWired | grep 802-3-ethernet.wake-on-lan</code> | <code>nmcli c show jademonkeyWired | grep 802-3-ethernet.wake-on-lan</code> | ||
*You will get an output like this | |||
802-3-ethernet.wake-on-lan: magic | 802-3-ethernet.wake-on-lan: magic | ||
| Line 39: | Line 45: | ||
802-3-ethernet.wake-on-lan-password: -- | 802-3-ethernet.wake-on-lan-password: -- | ||
*We want "magic" not "default" | |||
*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> | ||
Another thing you may need to do is | Another thing you may need to do is: | ||
<code>sudo ethtool -s enp1s0 wol g</code> | <code>sudo ethtool -s enp1s0 wol g</code> | ||
*This does not seem to be as persistent. | *This does not seem to be as persistent. | ||
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.