To connect to your AlgoVPN using [WireGuard](https://www.wireguard.com) from an Ubuntu Server 16.04 (Xenial) or 18.04 (Bionic) client, first install WireGuard on the client:
To connect to your AlgoVPN using [WireGuard](https://www.wireguard.com) from Ubuntu Server, first install WireGuard:
```shell
# Add the WireGuard repository:
sudo add-apt-repository ppa:wireguard/wireguard
# Update the list of available packages (not necessary on Bionic):
# Update the list of available packages (not necessary on Bionic or later):
sudo apt update
# Install the tools and kernel module:
sudo apt install wireguard
```
(For installation on other Linux distributions, see the [Installation](https://www.wireguard.com/install/) page on the WireGuard site.)
For installation on other Linux distributions, see the [Installation](https://www.wireguard.com/install/) page on the WireGuard site.
## Locate the Config File
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` before you ran `./algo`. Each Linux and Android client you connect to your Algo VPN must use a different WireGuard config file. Choose one of these files and copy it to your Linux client.
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.
If your client is running Bionic (or another Linux that uses `systemd-resolved` for DNS) you should first edit the config file. Comment out the line that begins with `DNS =` and replace it with:
## Configure DNS
### Ubuntu 18.04 (Bionic)
If your client is running Bionic (or another Linux that uses `systemd-resolved` for DNS but does not have `resolvectl` or `resolvconf` installed) you should first edit the config file. Comment out the line that begins with `DNS =` and replace it with:
```
PostUp = systemd-resolve -i %i --set-dns=172.16.0.1 --set-domain=~.
```
Use the IP address shown on the `DNS =` line (for most, this will be `172.16.0.1`). If the `DNS =` line contains multiple IP addresses, use multiple `--set-dns=` options.
### Ubuntu 18.10 (Cosmic) or 19.04 (Disco)
If your client is running Cosmic or Disco (or another Linux that uses `systemd-resolved` for DNS and has `resolvectl` but *not*`resolvconf` installed) you can either edit the config file as shown above for Bionic or run the following command once: