FAQs

Install Docker

On Ubuntu

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

sudo apt-get update

# Uninstall old versions
sudo apt-get remove docker docker-engine docker.io containerd runc

# Install 
sudo apt-get update
sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common
    
# Add Docker’s official GPG key:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

# Verify that you now have the key with the fingerprint 9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88, by searching for the last 8 characters of the fingerprint.
sudo apt-key fingerprint 0EBFCD88

# Set up the stable repository
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"
   
# INSTALL DOCKER ENGINE
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io

# Verify that Docker Engine is installed correctly
sudo docker run hello-world

# Post-installation steps for Linux
sudo usermod -aG docker $USER

# Now you can log out and log into the machine and try without sudo
docker run hello-world

How to display all containers with IPs

By default, docker ps can't display containers' IPs:

But it's quite flexible to custom the output. For example:

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