Bash setup script for Linux (Debian-based) servers

Want to run without Tailscale? Clone the open branch instead. Zerotier support can be found on the zerotier branch.

This is a setup script to automate the setup and provisioning of Linux (Debian-based) servers. It does the following:

Adds a new user account with sudo access
Adds a public ssh key for the new user account
Disables password authentication to the server
Deny root login to the server
Install Tailscale
Setup Tailscale network
Setup Uncomplicated Firewall with rules to allow SSH only from the Tailscale interface
Create Swap file based on machine's installed memory
Setup the timezone for the server (Default to "America/Sao_Paulo")
Install Network Time Protocol

first.sh

Installs curl htop screen sudo ufw in case the server does not have those yet.

ufw-fix.sh

Only required on Debian 10 (Buster). Changes iptables-nft to iptables-legacy. iptables-nft breaks ufw on the Debian Buster installs I tried it on.

docker.sh

Installs docker, docker-compose and ufw-docker (a tool to fix ufw/docker integration)

Installation

SSH into your server and install git if it is not installed:

sudo apt-get update
sudo apt-get install git

Clone this repository into your home directory:

cd ~
git clone https://github.com/Oujiii/vps-setup.git

Run the setup script

cd vps-setup
bash first.sh (if on Debian or Ubuntu minimal)
bash ufw-fix.sh (if on Debian 10)
bash setup.sh
bash docker.sh (if a docker install is wanted)

Setup prompts

When the setup script is run, you will be prompted to enter the username and password of the new user account.

Following that, you will then be prompted to add a public ssh key (which should be from your local machine) for the new account. To generate an ssh key from your local machine:

ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub

After that, you will be prompted for your Tailscale Pre-authentication key

Finally, you will be prompted to specify a timezone for the server. It will be set to 'America/Sao_Paulo' if you do not specify a value.

Supported versions

This setup script has been tested against Ubuntu 14.04, Ubuntu 16.04, Ubuntu 18.04, Ubuntu 20.04, Debian 9 (Stretch) and Debian 10 (Buster).