Introduction

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Updating initial server

sudo apt update sudo apt upgrade

Initial server setup

Source: https://www.digitalocean.com/community/tutorials/initial-server-setup-with-ubuntu-20-04

adduser sammy
usermod -aG sudo sammy

Logout. Login as sammy.

Setting up uncomplicated firewall.

sudo apt install ufw
sudo ufw allow OpenSSH
sudo ufw allow 443
sudo ufw allow 80
sudo ufw enable

Optional... Hardening Server

Add public ssh key

mkdir .ssh
cd .ssh 
nano authorized_keys

Disable Root Login

sudo sed --in-place 's/^PermitRootLogin.*/PermitRootLogin prohibit-password/g' /etc/ssh/sshd_config
sudo sed --in-place 's/#PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config

Passwordless Sudo

echo "${USERNAME} ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers

Installing Docker

Source: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04

sudo apt update
sudo apt install apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
sudo apt update
apt-cache policy docker-ce
sudo apt install docker-ce
sudo systemctl status docker
sudo usermod -aG docker ${USER}

logout sammy. relogin.

id -nG

should return: sammy sudo docker

Installing Docker-Compose

Source: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-compose-on-ubuntu-20-04

sudo curl -L "https://github.com/docker/compose/releases/download/1.26.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

docker-compose --version

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