I decided to suspend the file server during the daytime on weekdays to save electricity, so I have to manually cancel the suspend on a public holiday weekday. This itself is unavoidable, but at least, I want to be able to turn on remotely via LAN from the main machine rather than the power button . So I try the fanction called Wake-on-LAN.
Procedure (server side)
Reboot to enter the UEFI screen and set the boot over the LAN.
Depending on the motherboard, In my case, I switch
Power On By PCI-E/PCI to enabled.
As an aside, there was also an item named
Power On By RTC(faint memory). I think I probably need to enable this if I want to shut down and boot instead of suspending in rtcwake.
sudo apt install ethtool
Check the LAN used by Wake-on-LAN
$ ls/sys/class/net/ enp3s0 lo wlp4s0
In this case enp3s0 seems to be wired LAN,I use this. wlp4s0 is maybe wifi.
Enable with the following command:
$ sudo ethtool -s enp3s0 wol g
Check the settings.
$ sudo ethtool enp3s0 Settings for enp3s0: Supported ports: [ TP ] Supported link modes 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: Symmetric Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: off (auto) Supports Wake-on: pumbg Wake-on: g Current message level: 0x0000007 (7) drv probe link Link detected: yes
Check mac address
Before use Wake-on-LAN, I needs to know the MAC address that is specific ID of device that connecting to the LAN, so let’s check.
$ ip addr (ommission) 2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP>mtu 1500 qdisc mq state UP group default qlen 1000</BROADCAST,MULTICAST,UP,LOWER_UP> link/ether 04:92:26:00:00:00 brd ff:ff:ff:ff:ff:ff:ff:ff (ommitssion)
In this case 04:92:26:00:00:00:00 will be the target MAC address. (Because the referring source had conceal the MAC address, So follow that, this MAC address is canged from the actual MAC address .)
The server side works is end, so shut down.
Procedure (client side)
From here, I start the main PC side settings to run Wake-on-LAN.
It’s in the official repository of Ubuntu so you can install it normally with
$ sudo apt install wakeonlan
wakeonlan with MAC address.
$ wakeonlan 04:92:26:00:00:00 Sending magic packet to 255.255.255.255:9 with 04:92:26:da:61:3c
I was able to confirm the boot safely.