How to Set Up Docker

Installation (Ubuntu/Debian)

apt update
apt install ca-certificates curl gnupg -y

install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" > /etc/apt/sources.list.d/docker.list

apt update
apt install docker-ce docker-ce-cli containerd.io docker-compose-plugin -y

systemctl start docker
systemctl enable docker

docker run hello-world

Installation (CentOS/AlmaLinux)

dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
dnf install docker-ce docker-ce-cli containerd.io docker-compose-plugin -y
systemctl start docker
systemctl enable docker

Running Your First Container

# Run Nginx in a container
docker run -d --name webserver -p 80:80 nginx

# View running containers
docker ps

# Stop and remove
docker stop webserver
docker rm webserver