To wake up a backup NAS server and mirror files using rsync in Linux, you will need to use the wakeonlan command to send a Wake-On-LAN (WOL) packet to the NAS server, and then use the rsync command to synchronize the files.
Here's an example of how to wake up a backup NAS server and mirror files using rsync in Linux:
Find the MAC address of the backup NAS server. You can find the MAC address of the backup NAS server by checking the documentation for the server, or by using the arp command on the network.
Send a WOL packet to the backup NAS server. Use the wakeonlan command to send a WOL packet to the MAC address of the backup NAS server.
wakeonlan 00:11:22:33:44:55Sowww:ecru.lautturi.com
This will send a WOL packet to the NAS server, waking it up if it is in a powered-off state.
Wait for the NAS server to fully boot up. It may take a few minutes for the NAS server to fully boot up and become accessible over the network. You can use the ping command to check if the NAS server is available.
Synchronize the files using rsync. Once the NAS server is available, you can use the rsync command to synchronize the files.
rsync -avz /path/to/local/files user@nas:/path/to/remote/files
This will synchronize the files in the /path/to/local/files directory on the local machine with the /path/to/remote/files directory on the NAS server, transferring any new or updated files. The -a option tells rsync to preserve the file attributes and permissions, the -v option enables verbose output, and the -z option enables compression.