Initialize Debian/Ubuntu Server Script for Docker

deb_install_docker.sh

#!/bin/sh
# Install docker on Ubuntu/Debian
# (c) 2020-2022 Benjamin 'Benno' Falkner

set -e # halt on error

cat <<EOF
Init deb server
(c) 2019-2022 Benjamin 'Benno' Falkner (MIT-License) 
www.falkner.xyz
EOF

die() { # error funtction
        echo "ERROR: $@"
        exit 1
}

#check os
test "$(uname)" = "Linux" || die "linux only"

#check sudo
test "$(id -u)" -eq 0 && SUDO="" || SUDO=sudo

# check apt-get
apt-get --version > /dev/null  || die "APT pkg manager not used/installed"

# update
$SUDO apt-get update

# install curl and firewall
$SUDO apt-get -y install \
        curl \
        ufw \
        gnupg \
        lsb-release \
        ca-certificates
        
$SUDO ufw allow ssh

# prepare GPG
DIST="$(lsb_release -is | tr '[A-Z]' '[a-z]')"
test $DIST = "raspbian" && DIST="debian"
$SUDO mkdir -p /etc/apt/keyrings
curl -fsSL "https://download.docker.com/linux/$DIST/gpg" | $SUDO gpg --dearmor --yes -o /etc/apt/keyrings/docker.gpg

# prepare DEB
echo \
        "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/$DIST \
        $(lsb_release -cs) stable" | $SUDO tee /etc/apt/sources.list.d/docker.list > /dev/null
$SUDO apt-get update
$SUDO apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin