"Docker exec -it $1 bash" bash function for attaching to a running container

docker_exec.sh

function docker_exec {
  name="${1?needs one argument}"
  containerId=$(docker ps | awk -v app="$name" '$2 ~ app{print $1}')

  if [[ -n "$containerId" ]]; then
    docker exec -it $containerId bash
  else
    echo "No docker container with name: $name is running"
  fi
}

alias dx='docker_exec $1'

If you're constantly attaching to a running docker image, this makes it much easier. The original code was posted here: https://stackoverflow.com/questions/42422117/command-line-shortcut-to-connect-to-a-docker-container by anubhava. I just made it a function and made a small change or two.