Created VPS (markdown)

VPS.md

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+To run AdGuard DNS on a VPS, you need a server with Debian 8 or 9, x64 or x32.
+
+## Initial installation
+
+First let's ensure that your VPS has neccessary minimal requirements, run this as root:
+```bash
+apt-get install sudo nano bind9-host
+```
+
+Go to [AdGuard DNS page](https://github.com/AdguardTeam/AdguardDNS#installation) and download binaries for your architecture (64-bit Linux in this example).
+
+As of time of writing, latest version is v0.1
+
+To download AdGuard DNS and unpack it execute following commands:
+```bash
+wget https://github.com/AdguardTeam/AdguardDNS/releases/download/v0.1/AdguardDNS_0.1_linux_amd64.tar.gz
+tar xvf AdguardDNS_0.1_linux_amd64.tar.gz
+```
+
+You can find out the directory where you've unpacked it to by running these commands:
+```bash
+cd AdguardDNS
+pwd
+```
+
+In this example it is `/root/AdguardDNS`, now let's make it run on VPS boot:
+```bash
+sudo nano /etc/systemd/system/adguard-dns.service
+```
+
+A file will be opened, fill the file contents with this text:
+```ini
+[Unit]
+Description=AdGuard DNS
+After=syslog.target
+After=network.target
+
+[Service]
+Type=simple
+User=root
+Group=root
+WorkingDirectory=/root/AdguardDNS
+ExecStart=/root/AdguardDNS/AdguardDNS --host 0.0.0.0
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
+```
+
+Note that I've used `/root/AdguardDNS` in that file, replace both instances with your own values there. Write to the file and close it.
+
+After you're done with that, let's enable and start AdGuard DNS:
+```bash
+sudo systemctl enable adguard-dns
+sudo systemctl start adguard-dns
+```
+
+You can verify that it's working properly by running this command:
+```bash
+host doubleclick.net 127.0.0.1
+```
+
+If everything works correctly, you will get this output:
+```
+Using domain server:
+Name: 127.0.0.1
+Address: 127.0.0.1#53
+Aliases:
+
+Host doubleclick.net not found: 3(NXDOMAIN)
+```
+
+## Visit the web interface
+You can access your AdGuard DNS web interface on port 3000 by typing this in your browser — `http://1.2.3.4:3000/`
+
+Replace 1.2.3.4 with the IP address of your VPS.
+
+## Configure your devices to use your AdGuard DNS
+
+Now, once you've established that AdGuard DNS works on your VPS, you can use it on your machine by changing system DNS settings to use your VPS's public IP address.
+
+## (optional) Password-protect web interface
+
+You have an option to password-protect your AdGuard DNS's web interace so only you can access it.
+
+To do so, stop it first:
+```bash
+sudo systemctl stop adguard-dns
+```
+
+Then edit `/root/AdguardDNS/AdguardDNS.yaml` (substitute this path with your own as appropriate):
+```bash
+sudo nano /root/AdguardDNS/AdguardDNS.yaml
+```
+
+Find lines containing `auth_name: ""` and `auth_pass: ""` and replace them with username and password:
+```ini
+auth_name: "your-secret-name"
+auth_pass: "your-secret-password"
+```
+
+Substitute name and password with your own, of course.
+
+After you're done editing, save the file and start your AdGuard DNS again:
+```bash
+sudo systemctl start adguard-dns
+```
+
+After that, visiting web interface in browser will require entering username and password.