How to set up/manage services on a computer
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Reconfigure WireGuard

The SaveConfig = true directive causes the wg-quick service to overwrite the config file, so modifications to the config should either be made using the wg or ip commands directly, or by shutting down the wg-quick service before making any edits to the config file.

See Current Config

to see WireGuard's status and configuration, run:

sudo wg show

to see what ip the wg0 interface is configured with, run:

ip addr show wg0

Change Port

to change what port WireGuard listens on for interface wg0, run:

sudo wg set wg0 listen-port ${new_port:?}

Change IP

to change what IP the interface wg0 has, run:

ip addr del ${old_ip:?}/24 dev wg0
ip addr add ${new_ip:?}/24 dev wg0