How to Install Docker on Ubuntu

Docker lets you run applications in lightweight, portable containers.

Install Docker

# Remove old versions
apt remove docker docker-engine docker.io containerd runc 2>/dev/null

# Install prerequisites
apt update
apt install ca-certificates curl gnupg -y

# Add Docker GPG key and repository
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

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

Verify

docker run hello-world

Run Docker Without sudo

usermod -aG docker $USER
# Log out and back in