Quick Docker installation for Linux distros in one gist. (I have added this for my personal use, feel free to use & edit it however you like)

docker-centos7.sh

#!/bin/bash

# Make sure to run the file as super user (sudo) first.

# https://docs.docker.com/engine/install/centos/

# Install the yum-utils package to have yum-config-manager
yum install -y yum-utils

# Add Docker to the packages repository
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

# Install Docker Engine, containerd & Docker Compose
yum install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

# Enable & start Docker service
systemctl enable --now docker

# Test Docker
docker run hello-world

docker-debian.sh

#!/bin/bash

# Make sure to run the file as super user (sudo) first.

# https://docs.docker.com/engine/install/debian/

# Update the local packages db first
apt-get update -y

# Install the certificate authority, curl, gnupg
apt-get install ca-certificates curl gnupg -y

# Download & add the Docker's key
install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
chmod a+r /etc/apt/keyrings/docker.gpg

# Add Docker to the packages repository
echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
  tee /etc/apt/sources.list.d/docker.list > /dev/null
  
# Update the packages repository index
apt-get update -y

# Install Docker Engine, containerd & Docker Compose
apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y

# Test Docker
docker run hello-world

docker-rocky8.sh

#!/bin/bash

# Make sure to run the file as super user (sudo) first.

# https://docs.rockylinux.org/gemstones/docker/

# Update the package database
dnf check-update

# Add the docker repository
dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

# Install the latest version of Docker Engine, containerd, and Docker Compose
dnf -y install docker-ce docker-ce-cli containerd.io docker-compose-plugin

# Start and enable the systemd docker service
systemctl enable --now docker

# Verify that Docker is working properly
docker run hello-world

docker-ubuntu.sh

#!/bin/bash

# Make sure to run the file as super user (sudo) first.

# https://docs.docker.com/engine/install/ubuntu/

# Update the local packages db first
apt-get update -y

# Install the certificate authority, curl, gnupg
apt-get install ca-certificates curl gnupg -y

# Download & add the Docker's key
install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
chmod a+r /etc/apt/keyrings/docker.gpg

# Add Docker to the packages repository
echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
  tee /etc/apt/sources.list.d/docker.list > /dev/null
  
# Update the packages repository index
apt-get update -y

# Install Docker Engine, containerd & Docker Compose
apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y

# Test Docker
docker run hello-world

To use directly into your system, copy the raw url of the destination file above, and then run the following command:

With cURL:

sudo su
curl <url> | bash

With wget:

sudo su
wget -O - <url> | bash