# Sleep for 30 seconds to that laptop comes online /bin / sleep 30 # Verify and start backup /sbin / ping -q -c 30 192.168.2.25 >/dev /null # Try to wake up sleeping laptop at night and odd time as per cronjob /usr /bin /wakeonlan 48:2a:e3:5c: 16:bc home /backups /.keychain /backup-ssh-key #!/bin/bash # load ssh keys from keychain # vi /etc/sysconfig/network-scripts/ifcfg-eth0 If you are using RHEL / SL / Fedora / CentOS Linux, edit /etc/sysconfig/network-scripts/ifcfg-eth0: Output from my NAS server: Settings for eth0: Type the following command to see current status of wol for eth0: wol g : Sets Wake-on-LAN options using MagicPacket.Feel free to replace eth0 with your actual network interface device name. The ethtool command will configure eth0 to respond to the magic packet: After activating Wake On LAN (WoL) in your BIOS hardware option for the network interface card, it is also necessary to activate it using ethtool. More homelab.wol How Do I Verify That Remote Linux Server Supports Wake-on-LAN (WOL)?įirst, reboot the remote server and go to BIOS > Power Management > “Wake On LAN”. Let us display it using the more command or cat command/less command: The following is an example of a text file containing hardware addresses (macs). We can use a file as source of hardware and IP addresses: Here is how to use the limited broadcast address (255.255.255.255): You can obtained mac address using combination of the ping command and arp command: xx:yy:zz:11:22:33 is remote servers mac address.If your MAC address were xx:yy:zz:11:22:33, you would type: How Do I Send WOL Magic Packets Under Linux? See “macOS – Wake Up Servers Using Wake-on-LAN ( WOL ) Command Utility” for more info. Installing wakeonlan on macOS Unixįirst, install Homebrew on macOS and then run: Red Hat Linux and friends users should use the net-tools package, which may be installed by default. Type the following dnf command/yum command on your Fedora/RHEL/CentOS system. Sudo apt-get install wakeonlan Installing a tool to send a Wake-On-LAN “Magic Packet” on RHEL/CentOS Linux We can install it as follows on Debian/Ubuntu Linux: There is also Perl script to wake up computers. Type the following apt-get command/apt command to install the same under Debian / Ubuntu Linux desktop: We use the etherwake command to send a Wake-On-LAN “Magic Packet” under Linux operating systems. Linux Install etherwake Under Debian / Ubuntu Linux You will find various tools for all modern operating systems, including MS-Windows 8/10, Apple macOS & OS X, all modern Linux distros, FreeBSD, OpenBSD, NetBSD and many smartphones. It would be best if you used software to send WoL ( Wake-on-LAN ) magic packets to the target system. This is a quick guide to enable WOL under RHEL / Fedora / CentOS / Debian / Ubuntu Linux. Make sure you connect the NIC (eth0 or eth1) with the motherboard and enable the BIOS’s WOL function. You need to send ‘magic packets’ to wake-on-lan enabled ethernet adapters and motherboards to switch on the called systems. Wake-on-LAN (WOL) is an Ethernet networking standard that allows a server to be turned on by a network message.
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