Fresh docker install in linux

portainer.sh

#!/bin/bash

function error {
  echo -e "\\e[91m$1\\e[39m"
  exit 1
}

function check_internet() {
  printf "Checking if you are online..."
  wget -q --spider http://github.com
  if [ $? -eq 0 ]; then
    echo "Online. Continuing."
  else
    error "Offline. Go connect to the internet then run the script again."
  fi
}

check_internet

echo "Updating packages"
sudo apt-get update && sudo apt-get full-upgrade

echo "Installing docker"
curl -sSL https://get.docker.com | sh || error "Failed to install Docker."
sudo usermod -aG docker $USER || error "Failed to add user to the Docker usergroup."
sudo su - $USER
sudo service docker restart

echo "Installing portainer"
sudo docker pull portainer/portainer-ce:latest || error "Failed to pull latest Portainer docker image!"
sudo docker run -d -p 9000:9000 -p 9443:9443 --name=portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest || error "Failed to run Portainer docker image!"

echo "Remember to reboot for the changes to take effect."