lxc-network:tldr:22243

The command "lxc network set ${network_name} bridge.external_interfaces ${eth0}" is used to set the external interface for a specific LXC network.

Here's a breakdown of the command:

• "${network_name}" is a placeholder for the name of the LXC network you want to configure. You'll need to replace it with the actual name of the network.
• "bridge.external_interfaces" is the configuration parameter that defines the external interface for the network.
• "${eth0}" is another placeholder for the name of the external interface you want to set. You'll need to replace it with the actual name of the interface.

Basically, this command sets the external interface of the specified LXC network to the interface you specify. For example, if you want to set the external interface of a network called "my_network" to "eth0", you would execute the command as follows:

lxc network set my_network bridge.external_interfaces eth0