The Algo-generated config files for WireGuard are named `configs/<ip_address>/wireguard/<username>.conf` on the system where you ran `./algo`. One file was generated for each of the users you added to `config.cfg`. Each WireGuard client you connect to your AlgoVPN must use a different config file. Choose one of these files and copy it to your Linux client.
As of the `v1.0.20200510` release of `wireguard-tools` WireGuard supports setting a DNS search domain. In your `wg0.conf` file a non-numeric entry on the `DNS` line will be used as a search domain. For example this: