install docker ubuntu 18.04
# First check if there are any updates
sudo apt-get update
# allow apt to use repositories over the HTTPS protocol
sudo apt-get install \
apt-transport-https \
ca-certificates \
curl \
gnupg-agent \
software-properties-common
# Add docker's official GPG key by executing following command
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
# Add docker's repositories
sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
# update and install docker
sudo apt-get install docker-ce docker-ce-cli containerd.io