wakeonlan —
send Wake on LAN frames to hosts on a local Ethernet
  network
  
    | wakeonlan | [interface] lladdr
      [lladdr ...] | 
The wakeonlan program is used to send Wake on LAN (WoL)
  frames over a local Ethernet network to one or more hosts using their link
  layer (hardware) addresses. WoL functionality is generally enabled in a
  machine's BIOS and can be used to power on machines from a remote system
  without having physical access to them.
interface is an Ethernet interface of the
    local machine and is used to send the Wake on LAN frames over it. If there
    is only one Ethernet device available that is up and running, then the
    interface argument can be omitted.
    lladdr is the link layer address of the remote
    machine. This can be specified as a hardware address or as a hostname entry
    in /etc/ethers. wakeonlan
    accepts multiple lladdr addresses. Link layer
    addresses can be determined and set using
    ifconfig(8).
  - /etc/ethers
- Ethernet host name data base.
Thewakeonlan utility first appeared in
  NetBSD 6.0.
wakeonlan was written by Marc
  Balmer ⟨marc@msys.ch⟩.